Faster access than browser!
365 relations: Abiogenic petroleum origin, Abraham Langlet, Absolute zero, Abundance of the chemical elements, Acid, Activated carbon, Air embolism, Air Liquide, Air Products & Chemicals, Airship, Alfred Fowler, Alpha decay, Alpha particle, Aluminium, Amarillo, Texas, American Institute of Physics, American National Biography, Annalen der Physik, Apollo program, Arc welding, Argon, Argon fluorohydride, Arzew, Asphyxiant gas, Asteroid, Astronomische Nachrichten, Atmosphere, Atmosphere of Earth, Atmospheric escape, Atom, Atomic nucleus, Atomic number, Atomic orbital, Aurora, Ångström, Balloon, Barcode reader, Barotrauma, Barrage balloon, Baryon, BBC, BBC Online, Beta decay, Beta particle, Big Bang, Big Bang nucleosynthesis, Binding energy, Birkeland current, Bohr model, Boiling point, ..., Bolling Air Force Base, Boron, Bose–Einstein condensate, Boson, Brønsted–Lowry acid–base theory, Bulk modulus, Bushton, Kansas, Cambridge University Press, Carnotite, CBS News, CERN, Chemical compound, Chemical element, Chemically inert, Chemistry World, Chicago Tribune, Chromosphere, Classical physics, Clathrate compound, Cleveite, CNO cycle, Cold War, Coma, Combustibility and flammability, Compressibility, Computational chemistry, Cooper pair, Copper, Cosmic dust, Cosmology, Cryogenics, Crystal, Cyanosis, David Lee (physicist), Deep diving, Density, Deuterium, Dexter, Kansas, Diamond anvil cell, Diffusion, Dilution refrigerator, Douglas Osheroff, Eagle Point, Oregon, Edward Charles Pickering, Edward Frankland, Electride, Emission spectrum, Endohedral fullerene, Energy level, Erasmus Haworth, Ernest Rutherford, Evaporative cooler, Excimer, Federal government of the United States, Fermion, Fire retardant, Fluorite, Fractional distillation, Fraunhofer lines, Frostbite, Fullerene, Fundamental frequency, Fusion rocket, Gallon, Gamma ray, Gas, Gas chromatography, Georges Rayet, Germanium, Glow discharge, Government Accountability Office, Gravity, Gravity wave, Great Plains, Ground state, Guntur, Half-life, Halo nucleus, Hamilton Cady, Hampton Roads, Hard disk drive, Harvard College Observatory, Harvard University Press, Heat capacity, Heat capacity ratio, Heat transfer, Heike Kamerlingh Onnes, Helios, Heliox, Helium Act of 1925, Helium cryogenics, Helium dating, Helium dimer, Helium mass spectrometer, Helium Privatization Act of 1996, Helium-3, Helium-3 refrigerator, Helium-4, Helium–neon laser, Helsinki University of Technology, High-pressure nervous syndrome, Historical Studies in the Natural Sciences, Hugoton Gas Field, Human voice, Hydrogen, Hydrogen atom, Ideal gas, Impulse facility, Inert gas, Insulator (electricity), Interstellar medium, Ion, Ionization energy, Isotope, Isotopes of helium, Joule–Thomson effect, Journal of the American Chemical Society, Jupiter, Kansas, Kelvin, Lambda point, Laminar flow, Large Hadron Collider, Laser diode, Laser pointer, Leak, Leak detection, Leidenfrost effect, Lens (optics), Lifting gas, Lighter than air, LiHe, Liquefaction of gases, Liquid helium, Liquid nitrogen, Lithium, Lithosphere, Luigi Palmieri, LZ 129 Hindenburg, Macroscopic quantum phenomena, Magnetic resonance imaging, Magnetosphere, Manhattan Project, Mantle (geology), Matter, Max Planck Institute for Gravitational Physics, Melting point, Meteoric iron, Methane, Monatomic gas, Monazite, Monthly Notices of the Royal Astronomical Society, Moon, Mount Vesuvius, N. R. Pogson, Nanometre, NASA, National Helium Reserve, National Weather Service, Natural gas, Natural gas field, Nature (journal), Naval Aircraft Factory, Neon, Niels Bohr, Nitrogen, Nitrogen narcosis, Noble gas, Norman Lockyer, Nuclear binding energy, Nuclear fusion, Nuclear magnetic resonance, Nuclear magnetic resonance spectroscopy, Nuclear reaction, Nuclear reactor, Nuclear shell model, Nucleon, Nucleosynthesis, Ogg, Oklahoma, Ore, Oxygen, Particle statistics, Parts-per notation, Pascal (unit), Per Teodor Cleve, Periodic table, Periodic Videos, Peter W. Smith, Philosophical Magazine, Physics Today, Pickering series, Pierre Janssen, Pitch (music), Plasma (physics), Prandtl number, Proceedings of the Royal Society, Proton–proton chain reaction, Pyotr Kapitsa, Qatar, Quantum mechanics, Quantum solid, Radioactive decay, Radiogenic nuclide, Rare-earth element, Ras Laffan Industrial City, RasGas, Refractive index, Regolith, Relative atomic mass, Resonance, Reynolds number, Richard Threlfall, Robert Coleman Richardson, Rocket, Rocket propellant, Rollin film, Room temperature, Royal Society of Chemistry, Salient (geography), San Juan County, New Mexico, Saturn V, Second sound, Semipermeable membrane, Shielding gas, Silicon, Sintering, Skikda, Sodium, Solar eclipse of August 18, 1868, Solar wind, Solubility, South Pars/North Dome Gas-Condensate field, Space Race, Space vehicle, Spectral bands, Spectroscopy, Speed of sound, Spring (hydrology), Stable isotope ratio, Standard cubic foot, Star, Stellar nucleosynthesis, Styrofoam, Sublimation (phase transition), Sulfur hexafluoride, Sulfuric acid, Sun, Superconducting magnet, Superconductivity, Superfluidity, Supersonic wind tunnel, Sweden, Telescope, Tethered balloon, Texas, The Astrophysical Journal, Thermal conductivity, Thermal energy, Thermal expansion, Thermoacoustic heat engine, Thomas Royds, Thorium, Three-body problem, Timbre, Time (magazine), Timeline of chemical element discoveries, Titan (mythology), Titanium, Tonne, Tracer-gas leak testing, Trimix (breathing gas), Triple-alpha process, Tritium, Turbulence, TV Asahi, Ullage, United States Bureau of Mines, United States Congress, United States Department of the Interior, United States Navy, United States Senate, Universe, University of Alberta, University of Kansas, Uppsala, Uraninite, Uranium, USS Shenandoah (ZR-1), Vacuum flask, Valence (chemistry), Valence and conduction bands, Van der Waals force, Van der Waals molecule, Viscosity, Vocal tract, Voltage, Wafer (electronics), Wave equation, Wavelength, Welding, Willem Hendrik Keesom, William Crookes, William Francis Hillebrand, William Ramsay, Wolf–Rayet star, Wyoming, Xenon, Zeppelin, Zero-point energy, Zeta Puppis, Zirconium, 1-K pot, 2017–18 Qatar diplomatic crisis, 3B Junior. Expand index (315 more) »
Abiogenic petroleum origin
Abiogenic petroleum origin is a term used to describe a number of different hypotheses which propose that petroleum and natural gas are formed by inorganic means rather than by the decomposition of organisms.
New!!: Helium and Abiogenic petroleum origin · See more »
Abraham Langlet
Nils Abraham Langlet (9 July 1868 – 30 March 1936; known by his second given name) was a Swedish chemist.
New!!: Helium and Abraham Langlet · See more »
Absolute zero
Absolute zero is the lower limit of the thermodynamic temperature scale, a state at which the enthalpy and entropy of a cooled ideal gas reach their minimum value, taken as 0.
New!!: Helium and Absolute zero · See more »
Abundance of the chemical elements
The abundance of the chemical elements is a measure of the occurrence of the chemical elements relative to all other elements in a given environment.
New!!: Helium and Abundance of the chemical elements · See more »
Acid
An acid is a molecule or ion capable of donating a hydron (proton or hydrogen ion H+), or, alternatively, capable of forming a covalent bond with an electron pair (a Lewis acid).
New!!: Helium and Acid · See more »
Activated carbon
Activated carbon, also called activated charcoal, is a form of carbon processed to have small, low-volume pores that increase the surface area available for adsorption or chemical reactions.
New!!: Helium and Activated carbon · See more »
Air embolism
An air embolism, also known as a gas embolism, is a blood vessel blockage caused by one or more bubbles of air or other gas in the circulatory system.
New!!: Helium and Air embolism · See more »
Air Liquide
Air Liquide S.A. (literally "liquid air"), is a French multinational company which supplies industrial gases and services to various industries including medical, chemical and electronic manufacturers.
New!!: Helium and Air Liquide · See more »
Air Products & Chemicals
Air Products and Chemicals, Inc. is an American international corporation whose principal business is selling gases and chemicals for industrial uses.
New!!: Helium and Air Products & Chemicals · See more »
Airship
An airship or dirigible balloon is a type of aerostat or lighter-than-air aircraft that can navigate through the air under its own power.
New!!: Helium and Airship · See more »
Alfred Fowler
Alfred Fowler, CBE FRS (22 March 1868, in Yorkshire – 24 June 1940) was an English astronomer.
New!!: Helium and Alfred Fowler · See more »
Alpha decay
Alpha decay or α-decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle (helium nucleus) and thereby transforms or 'decays' into an atom with a mass number that is reduced by four and an atomic number that is reduced by two.
New!!: Helium and Alpha decay · See more »
Alpha particle
Alpha particles consist of two protons and two neutrons bound together into a particle identical to a helium-4 nucleus.
New!!: Helium and Alpha particle · See more »
Aluminium
Aluminium or aluminum is a chemical element with symbol Al and atomic number 13.
New!!: Helium and Aluminium · See more »
Amarillo, Texas
Amarillo is the 14th-most populous city in the state of Texas, United States.
New!!: Helium and Amarillo, Texas · See more »
American Institute of Physics
The American Institute of Physics (AIP) promotes science, the profession of physics, publishes physics journals, and produces publications for scientific and engineering societies.
New!!: Helium and American Institute of Physics · See more »
American National Biography
The American National Biography (ANB) is a 24-volume biographical encyclopedia set that contains about 17,400 entries and 20 million words, first published in 1999 by Oxford University Press under the auspices of the American Council of Learned Societies.
New!!: Helium and American National Biography · See more »
Annalen der Physik
Annalen der Physik (English: Annals of Physics) is one of the oldest scientific journals on physics and has been published since 1799.
New!!: Helium and Annalen der Physik · See more »
Apollo program
The Apollo program, also known as Project Apollo, was the third United States human spaceflight program carried out by the National Aeronautics and Space Administration (NASA), which accomplished landing the first humans on the Moon from 1969 to 1972.
New!!: Helium and Apollo program · See more »
Arc welding
Arc welding is a process that is used to join metal to metal by using electricity to create enough heat to melt metal, and the melted metals when cool result in a binding of the metals.
New!!: Helium and Arc welding · See more »
Argon
Argon is a chemical element with symbol Ar and atomic number 18.
New!!: Helium and Argon · See more »
Argon fluorohydride
Argon fluorohydride (systematically named fluoridohydridoargon) or argon hydrofluoride is an inorganic compound with the chemical formula HArF (also written ArHF).
New!!: Helium and Argon fluorohydride · See more »
Arzew
Arzew or Arzeu (أرزيو Berber; erziouw) is a port city in Algeria, 25 miles (40 km) from Oran.
New!!: Helium and Arzew · See more »
Asphyxiant gas
An asphyxiant gas is a nontoxic or minimally toxic gas which reduces or displaces the normal oxygen concentration in breathing air.
New!!: Helium and Asphyxiant gas · See more »
Asteroid
Asteroids are minor planets, especially those of the inner Solar System.
New!!: Helium and Asteroid · See more »
Astronomische Nachrichten
Astronomische Nachrichten (Astronomical Notes), one of the first international journals in the field of astronomy, was founded in 1821 by the German astronomer Heinrich Christian Schumacher.
New!!: Helium and Astronomische Nachrichten · See more »
Atmosphere
An atmosphere is a layer or a set of layers of gases surrounding a planet or other material body, that is held in place by the gravity of that body.
New!!: Helium and Atmosphere · See more »
Atmosphere of Earth
The atmosphere of Earth is the layer of gases, commonly known as air, that surrounds the planet Earth and is retained by Earth's gravity.
New!!: Helium and Atmosphere of Earth · See more »
Atmospheric escape
Atmospheric escape is the loss of planetary atmospheric gases to outer space.
New!!: Helium and Atmospheric escape · See more »
Atom
An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element.
New!!: Helium and Atom · See more »
Atomic nucleus
The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom, discovered in 1911 by Ernest Rutherford based on the 1909 Geiger–Marsden gold foil experiment.
New!!: Helium and Atomic nucleus · See more »
Atomic number
The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of an atom.
New!!: Helium and Atomic number · See more »
Atomic orbital
In quantum mechanics, an atomic orbital is a mathematical function that describes the wave-like behavior of either one electron or a pair of electrons in an atom.
New!!: Helium and Atomic orbital · See more »
Aurora
An aurora (plural: auroras or aurorae), sometimes referred to as polar lights, northern lights (aurora borealis) or southern lights (aurora australis), is a natural light display in the Earth's sky, predominantly seen in the high-latitude regions (around the Arctic and Antarctic).
New!!: Helium and Aurora · See more »
Ångström
The ångström or angstrom is a unit of length equal to (one ten-billionth of a metre) or 0.1 nanometre.
New!!: Helium and Ångström · See more »
Balloon
A balloon is a flexible bag that can be inflated with a gas, such as helium, hydrogen, nitrous oxide, oxygen, air or water.
New!!: Helium and Balloon · See more »
Barcode reader
A bar code reader (or bar code scanner) is an electronic device that can read and output printed barcodes to a computer.
New!!: Helium and Barcode reader · See more »
Barotrauma
Barotrauma is physical damage to body tissues caused by a difference in pressure between a gas space inside, or in contact with the body, and the surrounding gas or fluid.
New!!: Helium and Barotrauma · See more »
Barrage balloon
A barrage balloon is a large kite balloon used to defend against aircraft attack by raising aloft cables which pose a collision risk, making the attacker's approach more difficult.
New!!: Helium and Barrage balloon · See more »
Baryon
A baryon is a composite subatomic particle made up of three quarks (a triquark, as distinct from mesons, which are composed of one quark and one antiquark).
New!!: Helium and Baryon · See more »
BBC
The British Broadcasting Corporation (BBC) is a British public service broadcaster.
New!!: Helium and BBC · See more »
BBC Online
BBC Online, formerly known as BBCi, is the BBC's online service.
New!!: Helium and BBC Online · See more »
Beta decay
In nuclear physics, beta decay (β-decay) is a type of radioactive decay in which a beta ray (fast energetic electron or positron) and a neutrino are emitted from an atomic nucleus.
New!!: Helium and Beta decay · See more »
Beta particle
A beta particle, also called beta ray or beta radiation, (symbol β) is a high-energy, high-speed electron or positron emitted by the radioactive decay of an atomic nucleus during the process of beta decay.
New!!: Helium and Beta particle · See more »
Big Bang
The Big Bang theory is the prevailing cosmological model for the universe from the earliest known periods through its subsequent large-scale evolution.
New!!: Helium and Big Bang · See more »
Big Bang nucleosynthesis
In physical cosmology, Big Bang nucleosynthesis (abbreviated BBN, also known as primordial nucleosynthesis, arch(a)eonucleosynthesis, archonucleosynthesis, protonucleosynthesis and pal(a)eonucleosynthesis) refers to the production of nuclei other than those of the lightest isotope of hydrogen (hydrogen-1, 1H, having a single proton as a nucleus) during the early phases of the Universe.
New!!: Helium and Big Bang nucleosynthesis · See more »
Binding energy
Binding energy (also called separation energy) is the minimum energy required to disassemble a system of particles into separate parts.
New!!: Helium and Binding energy · See more »
Birkeland current
A Birkeland current is a set of currents that flow along geomagnetic field lines connecting the Earth’s magnetosphere to the Earth's high latitude ionosphere.
New!!: Helium and Birkeland current · See more »
Bohr model
In atomic physics, the Rutherford–Bohr model or Bohr model or Bohr diagram, introduced by Niels Bohr and Ernest Rutherford in 1913, depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus—similar to the structure of the Solar System, but with attraction provided by electrostatic forces rather than gravity.
New!!: Helium and Bohr model · See more »
Boiling point
The boiling point of a substance is the temperature at which the vapor pressure of the liquid equals the pressure surrounding the liquid and the liquid changes into a vapor.
New!!: Helium and Boiling point · See more »
Bolling Air Force Base
Bolling Air Force Base is a United States Air Force base in Washington, D.C. In 2010 it was merged with Naval Support Facility Anacostia to form Joint Base Anacostia–Bolling.
New!!: Helium and Bolling Air Force Base · See more »
Boron
Boron is a chemical element with symbol B and atomic number 5.
New!!: Helium and Boron · See more »
Bose–Einstein condensate
A Bose–Einstein condensate (BEC) is a state of matter of a dilute gas of bosons cooled to temperatures very close to absolute zero.
New!!: Helium and Bose–Einstein condensate · See more »
Boson
In quantum mechanics, a boson is a particle that follows Bose–Einstein statistics.
New!!: Helium and Boson · See more »
Brønsted–Lowry acid–base theory
The Brønsted–Lowry theory is an acid–base reaction theory which was proposed independently by Johannes Nicolaus Brønsted and Thomas Martin Lowry in 1923.
New!!: Helium and Brønsted–Lowry acid–base theory · See more »
Bulk modulus
The bulk modulus (K or B) of a substance is a measure of how resistant to compressibility that substance is.
New!!: Helium and Bulk modulus · See more »
Bushton, Kansas
Bushton is a city in Rice County, Kansas, United States.
New!!: Helium and Bushton, Kansas · See more »
Cambridge University Press
Cambridge University Press (CUP) is the publishing business of the University of Cambridge.
New!!: Helium and Cambridge University Press · See more »
Carnotite
Carnotite is a potassium uranium vanadate radioactive mineral with chemical formula K2(UO2)2(VO4)2·3H2O.
New!!: Helium and Carnotite · See more »
CBS News
CBS News is the news division of American television and radio service CBS.
New!!: Helium and CBS News · See more »
CERN
The European Organization for Nuclear Research (Organisation européenne pour la recherche nucléaire), known as CERN (derived from the name Conseil européen pour la recherche nucléaire), is a European research organization that operates the largest particle physics laboratory in the world.
New!!: Helium and CERN · See more »
Chemical compound
A chemical compound is a chemical substance composed of many identical molecules (or molecular entities) composed of atoms from more than one element held together by chemical bonds.
New!!: Helium and Chemical compound · See more »
Chemical element
A chemical element is a species of atoms having the same number of protons in their atomic nuclei (that is, the same atomic number, or Z).
New!!: Helium and Chemical element · See more »
Chemically inert
In chemistry, the term chemically inert is used to describe a substance that is not chemically reactive.
New!!: Helium and Chemically inert · See more »
Chemistry World
Chemistry World is a monthly chemistry news magazine published by the Royal Society of Chemistry.
New!!: Helium and Chemistry World · See more »
Chicago Tribune
The Chicago Tribune is a daily newspaper based in Chicago, Illinois, United States, owned by Tronc, Inc., formerly Tribune Publishing.
New!!: Helium and Chicago Tribune · See more »
Chromosphere
The chromosphere (literally, "sphere of color") is the second of the three main layers in the Sun's atmosphere and is roughly 3,000 to 5,000 kilometers deep.
New!!: Helium and Chromosphere · See more »
Classical physics
Classical physics refers to theories of physics that predate modern, more complete, or more widely applicable theories.
New!!: Helium and Classical physics · See more »
Clathrate compound
A clathrate is a chemical substance consisting of a lattice that traps or contains molecules.
New!!: Helium and Clathrate compound · See more »
Cleveite
Cleveite is an impure radioactive variety of uraninite containing uranium and found in Norway.
New!!: Helium and Cleveite · See more »
CNO cycle
The CNO cycle (for carbon–nitrogen–oxygen) is one of the two known sets of fusion reactions by which stars convert hydrogen to helium, the other being the proton–proton chain reaction.
New!!: Helium and CNO cycle · See more »
Cold War
The Cold War was a state of geopolitical tension after World War II between powers in the Eastern Bloc (the Soviet Union and its satellite states) and powers in the Western Bloc (the United States, its NATO allies and others).
New!!: Helium and Cold War · See more »
Coma
Coma is a state of unconsciousness in which a person cannot be awaken; fails to respond normally to painful stimuli, light, or sound; lacks a normal wake-sleep cycle; and does not initiate voluntary actions.
New!!: Helium and Coma · See more »
Combustibility and flammability
Flammable materials are those that ignite more easily than other materials, whereas those that are harder to ignite or burn less vigorously are combustible.
New!!: Helium and Combustibility and flammability · See more »
Compressibility
In thermodynamics and fluid mechanics, compressibility (also known as the coefficient of compressibility or isothermal compressibility) is a measure of the relative volume change of a fluid or solid as a response to a pressure (or mean stress) change.
New!!: Helium and Compressibility · See more »
Computational chemistry
Computational chemistry is a branch of chemistry that uses computer simulation to assist in solving chemical problems.
New!!: Helium and Computational chemistry · See more »
Cooper pair
In condensed matter physics, a Cooper pair or BCS pair is a pair of electrons (or other fermions) bound together at low temperatures in a certain manner first described in 1956 by American physicist Leon Cooper.
New!!: Helium and Cooper pair · See more »
Copper
Copper is a chemical element with symbol Cu (from cuprum) and atomic number 29.
New!!: Helium and Copper · See more »
Cosmic dust
Cosmic dust, also called extraterrestrial dust or space dust, is dust which exists in outer space, as well as all over planet Earth.
New!!: Helium and Cosmic dust · See more »
Cosmology
Cosmology (from the Greek κόσμος, kosmos "world" and -λογία, -logia "study of") is the study of the origin, evolution, and eventual fate of the universe.
New!!: Helium and Cosmology · See more »
Cryogenics
In physics, cryogenics is the production and behaviour of materials at very low temperatures.
New!!: Helium and Cryogenics · See more »
Crystal
A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.
New!!: Helium and Crystal · See more »
Cyanosis
Cyanosis is defined as the bluish or purplish discolouration of the skin or mucous membranes due to the tissues near the skin surface having low oxygen saturation.
New!!: Helium and Cyanosis · See more »
David Lee (physicist)
David Morris Lee (born January 20, 1931) is an American physicist who shared the 1996 Nobel Prize in Physics with Robert C. Richardson and Douglas Osheroff "for their discovery of superfluidity in helium-3.".
New!!: Helium and David Lee (physicist) · See more »
Deep diving
Deep diving is underwater diving to a depth beyond the norm accepted by the associated community.
New!!: Helium and Deep diving · See more »
Density
The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume.
New!!: Helium and Density · See more »
Deuterium
Deuterium (or hydrogen-2, symbol or, also known as heavy hydrogen) is one of two stable isotopes of hydrogen (the other being protium, or hydrogen-1).
New!!: Helium and Deuterium · See more »
Dexter, Kansas
Dexter is a city in Cowley County, Kansas, United States.
New!!: Helium and Dexter, Kansas · See more »
Diamond anvil cell
A diamond anvil cell (DAC) is a high-pressure device used in scientific experiments.
New!!: Helium and Diamond anvil cell · See more »
Diffusion
Diffusion is the net movement of molecules or atoms from a region of high concentration (or high chemical potential) to a region of low concentration (or low chemical potential) as a result of random motion of the molecules or atoms.
New!!: Helium and Diffusion · See more »
Dilution refrigerator
A 3He/4He dilution refrigerator is a cryogenic device that provides continuous cooling to temperatures as low as 2 mK, with no moving parts in the low-temperature region.
New!!: Helium and Dilution refrigerator · See more »
Douglas Osheroff
Douglas Dean Osheroff (born August 1, 1945) is a physicist known for his work in experimental condensed matter physics, in particular for his co-discovery of superfluidity in Helium-3.
New!!: Helium and Douglas Osheroff · See more »
Eagle Point, Oregon
Eagle Point is a city in Jackson County, Oregon, United States.
New!!: Helium and Eagle Point, Oregon · See more »
Edward Charles Pickering
Prof Edward Charles Pickering FRS(For) HFRSE (July 19, 1846 – February 3, 1919) was an American astronomer and physicist and the older brother to William Henry Pickering.
New!!: Helium and Edward Charles Pickering · See more »
Edward Frankland
Sir Edward Frankland, (18 January 1825 – 9 August 1899) was a British chemist.
New!!: Helium and Edward Frankland · See more »
Electride
An electride is a ionic compound in which an electron is the anion.
New!!: Helium and Electride · See more »
Emission spectrum
The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to an atom or molecule making a transition from a high energy state to a lower energy state.
New!!: Helium and Emission spectrum · See more »
Endohedral fullerene
Endohedral fullerenes, also called endofullerenes, are fullerenes that have additional atoms, ions, or clusters enclosed within their inner spheres.
New!!: Helium and Endohedral fullerene · See more »
Energy level
A quantum mechanical system or particle that is bound—that is, confined spatially—can only take on certain discrete values of energy.
New!!: Helium and Energy level · See more »
Erasmus Haworth
Erasmus Haworth (1855–1932) was an American geologist.
New!!: Helium and Erasmus Haworth · See more »
Ernest Rutherford
Ernest Rutherford, 1st Baron Rutherford of Nelson, HFRSE LLD (30 August 1871 – 19 October 1937) was a New Zealand-born British physicist who came to be known as the father of nuclear physics.
New!!: Helium and Ernest Rutherford · See more »
Evaporative cooler
An evaporative cooler (also swamp cooler, desert cooler and wet air cooler) is a device that cools air through the evaporation of water.
New!!: Helium and Evaporative cooler · See more »
Excimer
An excimer (originally short for excited dimer) is a short-lived dimeric or heterodimeric molecule formed from two species, at least one of which has completely filled valence shell by electrons (for example, noble gases).
New!!: Helium and Excimer · See more »
Federal government of the United States
The federal government of the United States (U.S. federal government) is the national government of the United States, a constitutional republic in North America, composed of 50 states, one district, Washington, D.C. (the nation's capital), and several territories.
New!!: Helium and Federal government of the United States · See more »
Fermion
In particle physics, a fermion is a particle that follows Fermi–Dirac statistics.
New!!: Helium and Fermion · See more »
Fire retardant
A fire retardant is a substance that is used to slow or stop the spread of fire or reduce its intensity.
New!!: Helium and Fire retardant · See more »
Fluorite
Not to be confused with Fluoride. Fluorite (also called fluorspar) is the mineral form of calcium fluoride, CaF2.
New!!: Helium and Fluorite · See more »
Fractional distillation
Fractional distillation is the separation of a mixture into its component parts, or fractions.
New!!: Helium and Fractional distillation · See more »
Fraunhofer lines
In physics and optics, the Fraunhofer lines are a set of spectral lines named after the German physicist Joseph von Fraunhofer (1787–1826).
New!!: Helium and Fraunhofer lines · See more »
Frostbite
Frostbite occurs when exposure to low temperatures causes freezing of the skin or other tissues.
New!!: Helium and Frostbite · See more »
Fullerene
A fullerene is a molecule of carbon in the form of a hollow sphere, ellipsoid, tube, and many other shapes.
New!!: Helium and Fullerene · See more »
Fundamental frequency
The fundamental frequency, often referred to simply as the fundamental, is defined as the lowest frequency of a periodic waveform.
New!!: Helium and Fundamental frequency · See more »
Fusion rocket
A fusion rocket is a theoretical design for a rocket driven by fusion propulsion which could provide efficient and long-term acceleration in space without the need to carry a large fuel supply.
New!!: Helium and Fusion rocket · See more »
Gallon
The gallon is a unit of measurement for fluid capacity in both the US customary units and the British imperial systems of measurement.
New!!: Helium and Gallon · See more »
Gamma ray
A gamma ray or gamma radiation (symbol γ or \gamma), is penetrating electromagnetic radiation arising from the radioactive decay of atomic nuclei.
New!!: Helium and Gamma ray · See more »
Gas
Gas is one of the four fundamental states of matter (the others being solid, liquid, and plasma).
New!!: Helium and Gas · See more »
Gas chromatography
Gas chromatography (GC) is a common type of chromatography used in analytical chemistry for separating and analyzing compounds that can be vaporized without decomposition.
New!!: Helium and Gas chromatography · See more »
Georges Rayet
Georges-Antoine-Pons Rayet (12 December 1839 – 14 June 1906) was a French astronomer.
New!!: Helium and Georges Rayet · See more »
Germanium
Germanium is a chemical element with symbol Ge and atomic number 32.
New!!: Helium and Germanium · See more »
Glow discharge
A glow discharge is a plasma formed by the passage of electric current through a gas.
New!!: Helium and Glow discharge · See more »
Government Accountability Office
The Government Accountability Office (GAO) is a legislative branch government agency that provides auditing, evaluation, and investigative services for the United States Congress.
New!!: Helium and Government Accountability Office · See more »
Gravity
Gravity, or gravitation, is a natural phenomenon by which all things with mass or energy—including planets, stars, galaxies, and even light—are brought toward (or gravitate toward) one another.
New!!: Helium and Gravity · See more »
Gravity wave
In fluid dynamics, gravity waves are waves generated in a fluid medium or at the interface between two media when the force of gravity or buoyancy tries to restore equilibrium.
New!!: Helium and Gravity wave · See more »
Great Plains
The Great Plains (sometimes simply "the Plains") is the broad expanse of flat land (a plain), much of it covered in prairie, steppe, and grassland, that lies west of the Mississippi River tallgrass prairie in the United States and east of the Rocky Mountains in the U.S. and Canada.
New!!: Helium and Great Plains · See more »
Ground state
The ground state of a quantum mechanical system is its lowest-energy state; the energy of the ground state is known as the zero-point energy of the system.
New!!: Helium and Ground state · See more »
Guntur
Guntur; is a city within the Andhra Pradesh Capital Region.
New!!: Helium and Guntur · See more »
Half-life
Half-life (symbol t1⁄2) is the time required for a quantity to reduce to half its initial value.
New!!: Helium and Half-life · See more »
Halo nucleus
In nuclear physics, an atomic nucleus is called a halo nucleus or is said to have a nuclear halo when it has a core nucleus surrounded by a "halo" of orbiting protons or neutrons, which makes the radius of the nucleus appreciably larger than that predicted by the liquid drop model.
New!!: Helium and Halo nucleus · See more »
Hamilton Cady
Hamilton Perkins Cady, (May 2, 1874 – May 26, 1943), was an American chemist who in 1907 in collaboration with David McFarland discovered that helium could be extracted from natural gas.
New!!: Helium and Hamilton Cady · See more »
Hampton Roads
Hampton Roads is the name of both a body of water in Virginia and the surrounding metropolitan region in Southeastern Virginia and Northeastern North Carolina, United States.
New!!: Helium and Hampton Roads · See more »
Hard disk drive
A hard disk drive (HDD), hard disk, hard drive or fixed disk is an electromechanical data storage device that uses magnetic storage to store and retrieve digital information using one or more rigid rapidly rotating disks (platters) coated with magnetic material.
New!!: Helium and Hard disk drive · See more »
Harvard College Observatory
The Harvard College Observatory (HCO) is an institution managing a complex of buildings and multiple instruments used for astronomical research by the Harvard University Department of Astronomy.
New!!: Helium and Harvard College Observatory · See more »
Harvard University Press
Harvard University Press (HUP) is a publishing house established on January 13, 1913, as a division of Harvard University, and focused on academic publishing.
New!!: Helium and Harvard University Press · See more »
Heat capacity
Heat capacity or thermal capacity is a measurable physical quantity equal to the ratio of the heat added to (or removed from) an object to the resulting temperature change.
New!!: Helium and Heat capacity · See more »
Heat capacity ratio
In thermal physics and thermodynamics, the heat capacity ratio or adiabatic index or ratio of specific heats or Poisson constant, is the ratio of the heat capacity at constant pressure to heat capacity at constant volume.
New!!: Helium and Heat capacity ratio · See more »
Heat transfer
Heat transfer is a discipline of thermal engineering that concerns the generation, use, conversion, and exchange of thermal energy (heat) between physical systems.
New!!: Helium and Heat transfer · See more »
Heike Kamerlingh Onnes
Professor Heike Kamerlingh Onnes FRSFor HFRSE FCS (21 September 1853 – 21 February 1926) was a Dutch physicist and Nobel laureate.
New!!: Helium and Heike Kamerlingh Onnes · See more »
Helios
Helios (Ἥλιος Hēlios; Latinized as Helius; Ἠέλιος in Homeric Greek) is the god and personification of the Sun in Greek mythology.
New!!: Helium and Helios · See more »
Heliox
Heliox is a breathing gas composed of a mixture of helium (He) and oxygen (O2).
New!!: Helium and Heliox · See more »
Helium Act of 1925
Helium Act of 1925, 50 USC § 161, is a United States statute drafted for the purpose of conservation, exploration, and procurement of helium gas.
New!!: Helium and Helium Act of 1925 · See more »
Helium cryogenics
In the field of cryogenics, helium is utilized for a variety of reasons.
New!!: Helium and Helium cryogenics · See more »
Helium dating
Helium dating may refer to the traditional uranium–thorium dating or uranium-thorium/helium dating.
New!!: Helium and Helium dating · See more »
Helium dimer
The helium dimer is a van der Waals molecule with formula He2 consisting of two helium atoms.
New!!: Helium and Helium dimer · See more »
Helium mass spectrometer
A helium mass spectrometer is an instrument commonly used to detect and locate small leaks.
New!!: Helium and Helium mass spectrometer · See more »
Helium Privatization Act of 1996
The Helium Privatization Act of 1996 is a United States statute that ordered the US government to sell much of the National Helium Reserve.
New!!: Helium and Helium Privatization Act of 1996 · See more »
Helium-3
Helium-3 (He-3, also written as 3He, see also helion) is a light, non-radioactive isotope of helium with two protons and one neutron (common helium having two protons and two neutrons).
New!!: Helium and Helium-3 · See more »
Helium-3 refrigerator
A helium-3 refrigerator is a simple device used in experimental physics for obtaining temperatures down to about 0.2 kelvins.
New!!: Helium and Helium-3 refrigerator · See more »
Helium-4
Helium-4 is a non-radioactive isotope of the element helium.
New!!: Helium and Helium-4 · See more »
Helium–neon laser
A helium–neon laser or HeNe laser, is a type of gas laser whose gain medium consists of a mixture of 85% helium and 15% neon inside of a small electrical discharge.
New!!: Helium and Helium–neon laser · See more »
Helsinki University of Technology
The Helsinki University of Technology (TKK; Teknillinen korkeakoulu; Tekniska högskolan) was a technical university in Finland.
New!!: Helium and Helsinki University of Technology · See more »
High-pressure nervous syndrome
High-pressure nervous syndrome (HPNS – also known as high-pressure neurological syndrome) is a neurological and physiological diving disorder that results when a diver descends below about using a breathing gas containing helium.
New!!: Helium and High-pressure nervous syndrome · See more »
Historical Studies in the Natural Sciences
Historical Studies in the Natural Sciences is a peer-reviewed academic journal published by University of California Press on behalf of the Office for History of Science and Technology (University of California, Berkeley).
New!!: Helium and Historical Studies in the Natural Sciences · See more »
Hugoton Gas Field
Hugoton Gas Field is a large natural gas field in the U.S. states of Kansas, Oklahoma, and Texas.
New!!: Helium and Hugoton Gas Field · See more »
Human voice
The human voice consists of sound made by a human being using the vocal tract, such as talking, singing, laughing, crying, screaming, etc.
New!!: Helium and Human voice · See more »
Hydrogen
Hydrogen is a chemical element with symbol H and atomic number 1.
New!!: Helium and Hydrogen · See more »
Hydrogen atom
A hydrogen atom is an atom of the chemical element hydrogen.
New!!: Helium and Hydrogen atom · See more »
Ideal gas
An ideal gas is a theoretical gas composed of many randomly moving point particles whose only interactions are perfectly elastic collisions.
New!!: Helium and Ideal gas · See more »
Impulse facility
A testing facility that relies on rapid release of stored energy to generate a short period of high enthalpy test conditions for testing of aerodynamic flow, aerodynamic heating and atmospheric reentry, combustion, chemical kinetics, ballistics, and other effects.
New!!: Helium and Impulse facility · See more »
Inert gas
An inert gas/noble gas is a gas which does not undergo chemical reactions under a set of given conditions.
New!!: Helium and Inert gas · See more »
Insulator (electricity)
An electrical insulator is a material whose internal electric charges do not flow freely; very little electric current will flow through it under the influence of an electric field.
New!!: Helium and Insulator (electricity) · See more »
Interstellar medium
In astronomy, the interstellar medium (ISM) is the matter and radiation that exists in the space between the star systems in a galaxy.
New!!: Helium and Interstellar medium · See more »
Ion
An ion is an atom or molecule that has a non-zero net electrical charge (its total number of electrons is not equal to its total number of protons).
New!!: Helium and Ion · See more »
Ionization energy
The ionization energy (Ei) is qualitatively defined as the amount of energy required to remove the most loosely bound electron, the valence electron, of an isolated gaseous atom to form a cation.
New!!: Helium and Ionization energy · See more »
Isotope
Isotopes are variants of a particular chemical element which differ in neutron number.
New!!: Helium and Isotope · See more »
Isotopes of helium
Although there are nine known isotopes of helium (2He) (standard atomic weight), only helium-3 and helium-4 are stable.
New!!: Helium and Isotopes of helium · See more »
Joule–Thomson effect
In thermodynamics, the Joule–Thomson effect (also known as the Joule–Kelvin effect, Kelvin–Joule effect, or Joule–Thomson expansion) describes the temperature change of a real gas or liquid (as differentiated from an ideal gas) when it is forced through a valve or porous plug while keeping them insulated so that no heat is exchanged with the environment.
New!!: Helium and Joule–Thomson effect · See more »
Journal of the American Chemical Society
The Journal of the American Chemical Society (also known as JACS) is a weekly peer-reviewed scientific journal that was established in 1879 by the American Chemical Society.
New!!: Helium and Journal of the American Chemical Society · See more »
Jupiter
Jupiter is the fifth planet from the Sun and the largest in the Solar System.
New!!: Helium and Jupiter · See more »
Kansas
Kansas is a U.S. state in the Midwestern United States.
New!!: Helium and Kansas · See more »
Kelvin
The Kelvin scale is an absolute thermodynamic temperature scale using as its null point absolute zero, the temperature at which all thermal motion ceases in the classical description of thermodynamics.
New!!: Helium and Kelvin · See more »
Lambda point
The Lambda point is the temperature at which normal fluid helium (helium I) makes the transition to superfluid helium II (approximately 2.17 K at 1 atmosphere).
New!!: Helium and Lambda point · See more »
Laminar flow
In fluid dynamics, laminar flow (or streamline flow) occurs when a fluid flows in parallel layers, with no disruption between the layers.
New!!: Helium and Laminar flow · See more »
Large Hadron Collider
The Large Hadron Collider (LHC) is the world's largest and most powerful particle collider, the most complex experimental facility ever built and the largest single machine in the world.
New!!: Helium and Large Hadron Collider · See more »
Laser diode
A laser diode, (LD), injection laser diode (ILD), or diode laser is a semiconductor device similar to a light-emitting diode in which the laser beam is created at the diode's junction.
New!!: Helium and Laser diode · See more »
Laser pointer
A laser pointer or laser pen is a small handheld device with a power source (usually a battery) and a laser diode emitting a very narrow coherent low-powered laser beam of visible light, intended to be used to highlight something of interest by illuminating it with a small bright spot of colored light.
New!!: Helium and Laser pointer · See more »
Leak
A leak is a way (usually an opening) for fluid to escape a container or fluid-containing system, such as a tank or a ship's hull, through which the contents of the container can escape or outside matter can enter the container.
New!!: Helium and Leak · See more »
Leak detection
Pipeline leak detection is used to determine if and in some cases where a leak has occurred in systems which contain liquids and gases.
New!!: Helium and Leak detection · See more »
Leidenfrost effect
The Leidenfrost effect is a physical phenomenon in which a liquid, in near contact with a mass significantly hotter than the liquid's boiling point, produces an insulating vapor layer keeping that liquid from boiling rapidly.
New!!: Helium and Leidenfrost effect · See more »
Lens (optics)
A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction.
New!!: Helium and Lens (optics) · See more »
Lifting gas
Because of Archimedes' principle, a lifting gas is required for aerostats to create buoyancy.
New!!: Helium and Lifting gas · See more »
Lighter than air
Lighter than air refers to materials (usually gases) that are buoyant in air because they have average densities lower than that of air.
New!!: Helium and Lighter than air · See more »
LiHe
LiHe is a compound of helium and lithium.
New!!: Helium and LiHe · See more »
Liquefaction of gases
Liquefaction of gases is physical conversion of a gas into a liquid state (condensation).
New!!: Helium and Liquefaction of gases · See more »
Liquid helium
At standard pressure, the chemical element helium exists in a liquid form only at the extremely low temperature of −270 °C (about 4 K or −452.2 °F).
New!!: Helium and Liquid helium · See more »
Liquid nitrogen
Liquid nitrogen is nitrogen in a liquid state at an extremely low temperature.
New!!: Helium and Liquid nitrogen · See more »
Lithium
Lithium (from lit) is a chemical element with symbol Li and atomic number 3.
New!!: Helium and Lithium · See more »
Lithosphere
A lithosphere (λίθος for "rocky", and σφαίρα for "sphere") is the rigid, outermost shell of a terrestrial-type planet, or natural satellite, that is defined by its rigid mechanical properties.
New!!: Helium and Lithosphere · See more »
Luigi Palmieri
Luigi Palmieri (April 22, 1807 – September 9, 1896) was an Italian physicist and meteorologist.
New!!: Helium and Luigi Palmieri · See more »
LZ 129 Hindenburg
LZ 129 Hindenburg (Luftschiff Zeppelin #129; Registration: D-LZ 129) was a large German commercial passenger-carrying rigid airship, the lead ship of the ''Hindenburg'' class, the longest class of flying machine and the largest airship by envelope volume.
New!!: Helium and LZ 129 Hindenburg · See more »
Macroscopic quantum phenomena
Macroscopic quantum phenomena refer to processes showing quantum behavior at the macroscopic scale, rather than at the atomic scale where quantum effects are prevalent.
New!!: Helium and Macroscopic quantum phenomena · See more »
Magnetic resonance imaging
Magnetic resonance imaging (MRI) is a medical imaging technique used in radiology to form pictures of the anatomy and the physiological processes of the body in both health and disease.
New!!: Helium and Magnetic resonance imaging · See more »
Magnetosphere
A magnetosphere is the region of space surrounding an astronomical object in which charged particles are manipulated or affected by that object's magnetic field.
New!!: Helium and Magnetosphere · See more »
Manhattan Project
The Manhattan Project was a research and development undertaking during World War II that produced the first nuclear weapons.
New!!: Helium and Manhattan Project · See more »
Mantle (geology)
The mantle is a layer inside a terrestrial planet and some other rocky planetary bodies.
New!!: Helium and Mantle (geology) · See more »
Matter
In the classical physics observed in everyday life, matter is any substance that has mass and takes up space by having volume.
New!!: Helium and Matter · See more »
Max Planck Institute for Gravitational Physics
The Max Planck Institute for Gravitational Physics (Albert Einstein Institute) is a Max Planck Institute whose research is aimed at investigating Einstein’s theory of relativity and beyond: Mathematics, quantum gravity, astrophysical relativity, and gravitational wave astronomy.
New!!: Helium and Max Planck Institute for Gravitational Physics · See more »
Melting point
The melting point (or, rarely, liquefaction point) of a substance is the temperature at which it changes state from solid to liquid at atmospheric pressure.
New!!: Helium and Melting point · See more »
Meteoric iron
Meteoric iron, sometimes meteoritic iron, is a native metal found in meteorites and made from the elements iron and nickel mainly in the form of the mineral phases kamacite and taenite.
New!!: Helium and Meteoric iron · See more »
Methane
Methane is a chemical compound with the chemical formula (one atom of carbon and four atoms of hydrogen).
New!!: Helium and Methane · See more »
Monatomic gas
In physics and chemistry, monatomic is a combination of the words "mono" and "atomic", and means "single atom".
New!!: Helium and Monatomic gas · See more »
Monazite
Monazite is a reddish-brown phosphate mineral containing rare-earth metals.
New!!: Helium and Monazite · See more »
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society (MNRAS) is a peer-reviewed scientific journal covering research in astronomy and astrophysics.
New!!: Helium and Monthly Notices of the Royal Astronomical Society · See more »
Moon
The Moon is an astronomical body that orbits planet Earth and is Earth's only permanent natural satellite.
New!!: Helium and Moon · See more »
Mount Vesuvius
Mount Vesuvius (Monte Vesuvio; Vesuvio; Mons Vesuvius; also Vesevus or Vesaevus in some Roman sources) is a somma-stratovolcano located on the Gulf of Naples in Campania, Italy, about east of Naples and a short distance from the shore.
New!!: Helium and Mount Vesuvius · See more »
N. R. Pogson
Norman Robert Pogson, CIE (23 March 1829 – 23 June 1891) was an English astronomer who worked in India at the Madras observatory.
New!!: Helium and N. R. Pogson · See more »
Nanometre
The nanometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: nm) or nanometer (American spelling) is a unit of length in the metric system, equal to one billionth (short scale) of a metre (m).
New!!: Helium and Nanometre · See more »
NASA
The National Aeronautics and Space Administration (NASA) is an independent agency of the executive branch of the United States federal government responsible for the civilian space program, as well as aeronautics and aerospace research.
New!!: Helium and NASA · See more »
National Helium Reserve
The National Helium Reserve, also known as the Federal Helium Reserve, is a strategic reserve of the United States holding over 1 billion cubic meters (109 m3) of helium gas.
New!!: Helium and National Helium Reserve · See more »
National Weather Service
The National Weather Service (NWS) is an agency of the United States Federal Government that is tasked with providing weather forecasts, warnings of hazardous weather, and other weather-related products to organizations and the public for the purposes of protection, safety, and general information.
New!!: Helium and National Weather Service · See more »
Natural gas
Natural gas is a naturally occurring hydrocarbon gas mixture consisting primarily of methane, but commonly including varying amounts of other higher alkanes, and sometimes a small percentage of carbon dioxide, nitrogen, hydrogen sulfide, or helium.
New!!: Helium and Natural gas · See more »
Natural gas field
Natural gas originates by the same geological thermal cracking process that converts kerogen to petroleum.
New!!: Helium and Natural gas field · See more »
Nature (journal)
Nature is a British multidisciplinary scientific journal, first published on 4 November 1869.
New!!: Helium and Nature (journal) · See more »
Naval Aircraft Factory
The Naval Aircraft Factory (NAF) was established by the United States Navy in 1918 in Philadelphia, Pennsylvania.
New!!: Helium and Naval Aircraft Factory · See more »
Neon
Neon is a chemical element with symbol Ne and atomic number 10.
New!!: Helium and Neon · See more »
Niels Bohr
Niels Henrik David Bohr (7 October 1885 – 18 November 1962) was a Danish physicist who made foundational contributions to understanding atomic structure and quantum theory, for which he received the Nobel Prize in Physics in 1922.
New!!: Helium and Niels Bohr · See more »
Nitrogen
Nitrogen is a chemical element with symbol N and atomic number 7.
New!!: Helium and Nitrogen · See more »
Nitrogen narcosis
Narcosis while diving (also known as nitrogen narcosis, inert gas narcosis, raptures of the deep, Martini effect) is a reversible alteration in consciousness that occurs while diving at depth.
New!!: Helium and Nitrogen narcosis · See more »
Noble gas
The noble gases (historically also the inert gases) make up a group of chemical elements with similar properties; under standard conditions, they are all odorless, colorless, monatomic gases with very low chemical reactivity.
New!!: Helium and Noble gas · See more »
Norman Lockyer
Sir Joseph Norman Lockyer, KCB FRS (17 May 1836 – 16 August 1920), known simply as Norman Lockyer, was an English scientist and astronomer.
New!!: Helium and Norman Lockyer · See more »
Nuclear binding energy
Nuclear binding energy is the minimum energy that would be required to disassemble the nucleus of an atom into its component parts.
New!!: Helium and Nuclear binding energy · See more »
Nuclear fusion
In nuclear physics, nuclear fusion is a reaction in which two or more atomic nuclei come close enough to form one or more different atomic nuclei and subatomic particles (neutrons or protons).
New!!: Helium and Nuclear fusion · See more »
Nuclear magnetic resonance
Nuclear magnetic resonance (NMR) is a physical phenomenon in which nuclei in a magnetic field absorb and re-emit electromagnetic radiation.
New!!: Helium and Nuclear magnetic resonance · See more »
Nuclear magnetic resonance spectroscopy
Nuclear magnetic resonance spectroscopy, most commonly known as NMR spectroscopy or magnetic resonance spectroscopy (MRS), is a spectroscopic technique to observe local magnetic fields around atomic nuclei.
New!!: Helium and Nuclear magnetic resonance spectroscopy · See more »
Nuclear reaction
In nuclear physics and nuclear chemistry, a nuclear reaction is semantically considered to be the process in which two nuclei, or else a nucleus of an atom and a subatomic particle (such as a proton, neutron, or high energy electron) from outside the atom, collide to produce one or more nuclides that are different from the nuclide(s) that began the process.
New!!: Helium and Nuclear reaction · See more »
Nuclear reactor
A nuclear reactor, formerly known as an atomic pile, is a device used to initiate and control a self-sustained nuclear chain reaction.
New!!: Helium and Nuclear reactor · See more »
Nuclear shell model
In nuclear physics and nuclear chemistry, the nuclear shell model is a model of the atomic nucleus which uses the Pauli exclusion principle to describe the structure of the nucleus in terms of energy levels.
New!!: Helium and Nuclear shell model · See more »
Nucleon
In chemistry and physics, a nucleon is either a proton or a neutron, considered in its role as a component of an atomic nucleus.
New!!: Helium and Nucleon · See more »
Nucleosynthesis
Nucleosynthesis is the process that creates new atomic nuclei from pre-existing nucleons, primarily protons and neutrons.
New!!: Helium and Nucleosynthesis · See more »
Ogg
Ogg is a free, open container format maintained by the Xiph.Org Foundation.
New!!: Helium and Ogg · See more »
Oklahoma
Oklahoma (Uukuhuúwa, Gahnawiyoˀgeh) is a state in the South Central region of the United States.
New!!: Helium and Oklahoma · See more »
Ore
An ore is an occurrence of rock or sediment that contains sufficient minerals with economically important elements, typically metals, that can be economically extracted from the deposit.
New!!: Helium and Ore · See more »
Oxygen
Oxygen is a chemical element with symbol O and atomic number 8.
New!!: Helium and Oxygen · See more »
Particle statistics
Particle statistics is a particular description of multiple particles in statistical mechanics.
New!!: Helium and Particle statistics · See more »
Parts-per notation
In science and engineering, the parts-per notation is a set of pseudo-units to describe small values of miscellaneous dimensionless quantities, e.g. mole fraction or mass fraction.
New!!: Helium and Parts-per notation · See more »
Pascal (unit)
The pascal (symbol: Pa) is the SI derived unit of pressure used to quantify internal pressure, stress, Young's modulus and ultimate tensile strength.
New!!: Helium and Pascal (unit) · See more »
Per Teodor Cleve
Per Teodor Cleve (10 February 1840 – 18 June 1905) was a Swedish chemist, biologist, mineralogist and oceanographer.
New!!: Helium and Per Teodor Cleve · See more »
Periodic table
The periodic table is a tabular arrangement of the chemical elements, ordered by their atomic number, electron configuration, and recurring chemical properties, whose structure shows periodic trends.
New!!: Helium and Periodic table · See more »
Periodic Videos
The Periodic Table of Videos (usually shortened to Periodic Videos) is a series of videos about chemical elements and the periodic table.
New!!: Helium and Periodic Videos · See more »
Peter W. Smith
Peter W. Smith (February 23, 1936 – May 14, 2017) was an American investment banker who had a 40-year career managing corporate acquisitions and venture investments.
New!!: Helium and Peter W. Smith · See more »
Philosophical Magazine
The Philosophical Magazine is one of the oldest scientific journals published in English.
New!!: Helium and Philosophical Magazine · See more »
Physics Today
Physics Today is the membership magazine of the American Institute of Physics that was established in 1948.
New!!: Helium and Physics Today · See more »
Pickering series
The Pickering series (also known as the Pickering–Fowler series) consists of three lines of singly ionized helium found, usually in absorption, in the spectra of hot stars like Wolf-Rayet stars.
New!!: Helium and Pickering series · See more »
Pierre Janssen
Pierre Jules César Janssen (22 February 1824 – 23 December 1907), also known as Jules Janssen, was a French astronomer who, along with English scientist Joseph Norman Lockyer, is credited with discovering the gaseous nature of the solar chromosphere, and with some justification the element helium.
New!!: Helium and Pierre Janssen · See more »
Pitch (music)
Pitch is a perceptual property of sounds that allows their ordering on a frequency-related scale, or more commonly, pitch is the quality that makes it possible to judge sounds as "higher" and "lower" in the sense associated with musical melodies.
New!!: Helium and Pitch (music) · See more »
Plasma (physics)
Plasma (Henry George Liddell, Robert Scott, A Greek English Lexicon, on Perseus) is one of the four fundamental states of matter, and was first described by chemist Irving Langmuir in the 1920s.
New!!: Helium and Plasma (physics) · See more »
Prandtl number
The Prandtl number (Pr) or Prandtl group is a dimensionless number, named after the German physicist Ludwig Prandtl, defined as the ratio of momentum diffusivity to thermal diffusivity.
New!!: Helium and Prandtl number · See more »
Proceedings of the Royal Society
Proceedings of the Royal Society is the parent title of two scientific journals published by the Royal Society.
New!!: Helium and Proceedings of the Royal Society · See more »
Proton–proton chain reaction
The proton–proton chain reaction is one of the two (known) sets of fusion reactions by which stars convert hydrogen to helium.
New!!: Helium and Proton–proton chain reaction · See more »
Pyotr Kapitsa
Pyotr Leonidovich Kapitsa or Peter Kapitza (Russian: Пётр Леони́дович Капи́ца, Romanian: Petre Capiţa (– 8 April 1984) was a leading Soviet physicist and Nobel laureate, best known for his work in low-temperature physics.
New!!: Helium and Pyotr Kapitsa · See more »
Qatar
Qatar (or; قطر; local vernacular pronunciation), officially the State of Qatar (دولة قطر), is a sovereign country located in Western Asia, occupying the small Qatar Peninsula on the northeastern coast of the Arabian Peninsula.
New!!: Helium and Qatar · See more »
Quantum mechanics
Quantum mechanics (QM; also known as quantum physics, quantum theory, the wave mechanical model, or matrix mechanics), including quantum field theory, is a fundamental theory in physics which describes nature at the smallest scales of energy levels of atoms and subatomic particles.
New!!: Helium and Quantum mechanics · See more »
Quantum solid
In physics, a quantum solid is a type of solid that is "intrinsically restless", in the sense that atoms continuously vibrate about their position and exchange places even at absolute zero.
New!!: Helium and Quantum solid · See more »
Radioactive decay
Radioactive decay (also known as nuclear decay or radioactivity) is the process by which an unstable atomic nucleus loses energy (in terms of mass in its rest frame) by emitting radiation, such as an alpha particle, beta particle with neutrino or only a neutrino in the case of electron capture, gamma ray, or electron in the case of internal conversion.
New!!: Helium and Radioactive decay · See more »
Radiogenic nuclide
A radiogenic nuclide is a nuclide that is produced by a process of radioactive decay.
New!!: Helium and Radiogenic nuclide · See more »
Rare-earth element
A rare-earth element (REE) or rare-earth metal (REM), as defined by IUPAC, is one of a set of seventeen chemical elements in the periodic table, specifically the fifteen lanthanides, as well as scandium and yttrium.
New!!: Helium and Rare-earth element · See more »
Ras Laffan Industrial City
Ras Laffan Industrial City is an industrial hub located north of Doha, Qatar.
New!!: Helium and Ras Laffan Industrial City · See more »
RasGas
RasGas Company Limited was a liquefied natural gas (LNG) producing company in Qatar.
New!!: Helium and RasGas · See more »
Refractive index
In optics, the refractive index or index of refraction of a material is a dimensionless number that describes how light propagates through that medium.
New!!: Helium and Refractive index · See more »
Regolith
Regolith is a layer of loose, heterogeneous superficial deposits covering solid rock.
New!!: Helium and Regolith · See more »
Relative atomic mass
Relative atomic mass (symbol: A) or atomic weight is a dimensionless physical quantity defined as the ratio of the average mass of atoms of a chemical element in a given sample to one unified atomic mass unit.
New!!: Helium and Relative atomic mass · See more »
Resonance
In physics, resonance is a phenomenon in which a vibrating system or external force drives another system to oscillate with greater amplitude at specific frequencies.
New!!: Helium and Resonance · See more »
Reynolds number
The Reynolds number is an important dimensionless quantity in fluid mechanics used to help predict flow patterns in different fluid flow situations.
New!!: Helium and Reynolds number · See more »
Richard Threlfall
Sir Richard Threlfall (14 August 1861 – 10 July 1932) was an English chemist and engineer, he established the School of Physics at the University of Sydney and made important contributions to military science during World War I. He was elected a fellow of the Royal Society in 1899, and was created KBE in 1917 and GBE in 1927.
New!!: Helium and Richard Threlfall · See more »
Robert Coleman Richardson
Robert Coleman Richardson (June 26, 1937 – February 19, 2013) was an American experimental physicist whose area of research included sub-millikelvin temperature studies of helium-3.
New!!: Helium and Robert Coleman Richardson · See more »
Rocket
A rocket (from Italian rocchetto "bobbin") is a missile, spacecraft, aircraft or other vehicle that obtains thrust from a rocket engine.
New!!: Helium and Rocket · See more »
Rocket propellant
Rocket propellant is a material used either directly by a rocket as the reaction mass (propulsive mass) that is ejected, typically with very high speed, from a rocket engine to produce thrust, and thus provide spacecraft propulsion, or indirectly to produce the reaction mass in a chemical reaction.
New!!: Helium and Rocket propellant · See more »
Rollin film
A Rollin film, named after Bernard V. Rollin, is a 30 nm-thick liquid film of helium in the helium II state.
New!!: Helium and Rollin film · See more »
Room temperature
Colloquially, room temperature is the range of air temperatures that most people prefer for indoor settings, which feel comfortable when wearing typical indoor clothing.
New!!: Helium and Room temperature · See more »
Royal Society of Chemistry
The Royal Society of Chemistry (RSC) is a learned society (professional association) in the United Kingdom with the goal of "advancing the chemical sciences".
New!!: Helium and Royal Society of Chemistry · See more »
Salient (geography)
A salient is an elongated protrusion of a geopolitical entity, such as a subnational entity or a sovereign state.
New!!: Helium and Salient (geography) · See more »
San Juan County, New Mexico
San Juan County is a county in the U.S. state of New Mexico.
New!!: Helium and San Juan County, New Mexico · See more »
Saturn V
The Saturn V (pronounced "Saturn five") was an American human-rated expendable rocket used by NASA between 1967 and 1973.
New!!: Helium and Saturn V · See more »
Second sound
Second sound is a quantum mechanical phenomenon in which heat transfer occurs by wave-like motion, rather than by the more usual mechanism of diffusion.
New!!: Helium and Second sound · See more »
Semipermeable membrane
A semipermeable membrane is a type of biological or synthetic, polymeric membrane that will allow certain molecules or ions to pass through it by diffusion—or occasionally by more specialized processes of facilitated diffusion, passive transport or active transport.
New!!: Helium and Semipermeable membrane · See more »
Shielding gas
Shielding gases are inert or semi-inert gases that are commonly used in several welding processes, most notably gas metal arc welding and gas tungsten arc welding (GMAW and GTAW, more popularly known as MIG and TIG, respectively).
New!!: Helium and Shielding gas · See more »
Silicon
Silicon is a chemical element with symbol Si and atomic number 14.
New!!: Helium and Silicon · See more »
Sintering
Clinker nodules produced by sintering Sintering is the process of compacting and forming a solid mass of material by heat or pressure without melting it to the point of liquefaction.
New!!: Helium and Sintering · See more »
Skikda
Skikda (سكيكدة) is a city in north eastern Algeria and a port on the Gulf of Stora, the ancient Sinus Numidicus.
New!!: Helium and Skikda · See more »
Sodium
Sodium is a chemical element with symbol Na (from Latin natrium) and atomic number 11.
New!!: Helium and Sodium · See more »
Solar eclipse of August 18, 1868
A total solar eclipse occurred on August 18, 1868, also known as "The King of Siam's eclipse".
New!!: Helium and Solar eclipse of August 18, 1868 · See more »
Solar wind
The solar wind is a stream of charged particles released from the upper atmosphere of the Sun, called the corona.
New!!: Helium and Solar wind · See more »
Solubility
Solubility is the property of a solid, liquid or gaseous chemical substance called solute to dissolve in a solid, liquid or gaseous solvent.
New!!: Helium and Solubility · See more »
South Pars/North Dome Gas-Condensate field
The South Pars/North Dome field is a natural-gas condensate field located in the Persian Gulf.
New!!: Helium and South Pars/North Dome Gas-Condensate field · See more »
Space Race
The Space Race refers to the 20th-century competition between two Cold War rivals, the Soviet Union (USSR) and the United States (US), for dominance in spaceflight capability.
New!!: Helium and Space Race · See more »
Space vehicle
A space vehicle or spaceship is a rocket-powered vehicle used to transport unmanned satellites or humans between the Earth's surface and outer space.
New!!: Helium and Space vehicle · See more »
Spectral bands
Spectral bands are part of optical spectra of polyatomic systems, including condensed materials, large molecules, etc.
New!!: Helium and Spectral bands · See more »
Spectroscopy
Spectroscopy is the study of the interaction between matter and electromagnetic radiation.
New!!: Helium and Spectroscopy · See more »
Speed of sound
The speed of sound is the distance travelled per unit time by a sound wave as it propagates through an elastic medium.
New!!: Helium and Speed of sound · See more »
Spring (hydrology)
A spring is any natural situation where water flows from an aquifer to the Earth's surface.
New!!: Helium and Spring (hydrology) · See more »
Stable isotope ratio
The term stable isotope has a meaning similar to stable nuclide, but is preferably used when speaking of nuclides of a specific element.
New!!: Helium and Stable isotope ratio · See more »
Standard cubic foot
A standard cubic foot (scf) is a unit used both in the natural gas industry to represent an amount of natural gas and in other industries where other gases are used.
New!!: Helium and Standard cubic foot · See more »
Star
A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.
New!!: Helium and Star · See more »
Stellar nucleosynthesis
Stellar nucleosynthesis is the theory explaining the creation (nucleosynthesis) of chemical elements by nuclear fusion reactions between atoms within the stars.
New!!: Helium and Stellar nucleosynthesis · See more »
Styrofoam
Styrofoam is a trademarked brand of closed-cell extruded polystyrene foam (XPS), commonly called "Blue Board" manufactured as foam continuous building insulation board used in walls, roofs, and foundations as thermal insulation and water barrier.
New!!: Helium and Styrofoam · See more »
Sublimation (phase transition)
Sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.
New!!: Helium and Sublimation (phase transition) · See more »
Sulfur hexafluoride
Sulfur hexafluoride (SF6) is an inorganic, colorless, odorless, non-flammable, extremely potent greenhouse gas, and an excellent electrical insulator.
New!!: Helium and Sulfur hexafluoride · See more »
Sulfuric acid
Sulfuric acid (alternative spelling sulphuric acid) is a mineral acid with molecular formula H2SO4.
New!!: Helium and Sulfuric acid · See more »
Sun
The Sun is the star at the center of the Solar System.
New!!: Helium and Sun · See more »
Superconducting magnet
A superconducting magnet is an electromagnet made from coils of superconducting wire.
New!!: Helium and Superconducting magnet · See more »
Superconductivity
Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic flux fields occurring in certain materials, called superconductors, when cooled below a characteristic critical temperature.
New!!: Helium and Superconductivity · See more »
Superfluidity
Superfluidity is the characteristic property of a fluid with zero viscosity which therefore flows without loss of kinetic energy.
New!!: Helium and Superfluidity · See more »
Supersonic wind tunnel
A supersonic wind tunnel is a wind tunnel that produces supersonic speeds (1.2\leq the total pressure ratio over normal shock at M in test section: \frac \leq\left(\frac\right)_ Examples.
New!!: Helium and Supersonic wind tunnel · See more »
Sweden
Sweden (Sverige), officially the Kingdom of Sweden (Swedish), is a Scandinavian country in Northern Europe.
New!!: Helium and Sweden · See more »
Telescope
A telescope is an optical instrument that aids in the observation of remote objects by collecting electromagnetic radiation (such as visible light).
New!!: Helium and Telescope · See more »
Tethered balloon
A tethered, moored or captive balloon is a balloon that is restrained by one or more tethers attached to the ground and so it cannot float freely.
New!!: Helium and Tethered balloon · See more »
Texas
Texas (Texas or Tejas) is the second largest state in the United States by both area and population.
New!!: Helium and Texas · See more »
The Astrophysical Journal
The Astrophysical Journal, often abbreviated ApJ (pronounced "ap jay") in references and speech, is a peer-reviewed scientific journal of astrophysics and astronomy, established in 1895 by American astronomers George Ellery Hale and James Edward Keeler.
New!!: Helium and The Astrophysical Journal · See more »
Thermal conductivity
Thermal conductivity (often denoted k, λ, or κ) is the property of a material to conduct heat.
New!!: Helium and Thermal conductivity · See more »
Thermal energy
Thermal energy is a term used loosely as a synonym for more rigorously-defined thermodynamic quantities such as the internal energy of a system; heat or sensible heat, which are defined as types of transfer of energy (as is work); or for the characteristic energy of a degree of freedom in a thermal system kT, where T is temperature and k is the Boltzmann constant.
New!!: Helium and Thermal energy · See more »
Thermal expansion
Thermal expansion is the tendency of matter to change in shape, area, and volume in response to a change in temperature.
New!!: Helium and Thermal expansion · See more »
Thermoacoustic heat engine
Thermoacoustic engines (sometimes called "TA engines") are thermoacoustic devices which use high-amplitude sound waves to pump heat from one place to another, or conversely use a heat difference to induce high-amplitude sound waves.
New!!: Helium and Thermoacoustic heat engine · See more »
Thomas Royds
Thomas Royds (April 11, 1884 – May 1, 1955) was a Solar physicist who worked with Ernest Rutherford on the identification of alpha radiation as the nucleus of the helium atom, and who was Director of the Kodaikanal Solar Observatory.
New!!: Helium and Thomas Royds · See more »
Thorium
Thorium is a weakly radioactive metallic chemical element with symbol Th and atomic number 90.
New!!: Helium and Thorium · See more »
Three-body problem
In physics and classical mechanics, the three-body problem is the problem of taking an initial set of data that specifies the positions, masses, and velocities of three bodies for some particular point in time and then determining the motions of the three bodies, in accordance with Newton's laws of motion and of universal gravitation, which are the laws of classical mechanics.
New!!: Helium and Three-body problem · See more »
Timbre
In music, timbre (also known as tone color or tone quality from psychoacoustics) is the perceived sound quality of a musical note, sound or tone.
New!!: Helium and Timbre · See more »
Time (magazine)
Time is an American weekly news magazine and news website published in New York City.
New!!: Helium and Time (magazine) · See more »
Timeline of chemical element discoveries
The discovery of the 118 chemical elements known to exist today is presented here in chronological order.
New!!: Helium and Timeline of chemical element discoveries · See more »
Titan (mythology)
In Greek mythology, the Titans (Greek: Τιτάν, Titán, Τiτᾶνες, Titânes) and Titanesses (or Titanides; Greek: Τιτανίς, Titanís, Τιτανίδες, Titanídes) were members of the second generation of divine beings, descending from the primordial deities and preceding the Olympians.
New!!: Helium and Titan (mythology) · See more »
Titanium
Titanium is a chemical element with symbol Ti and atomic number 22.
New!!: Helium and Titanium · See more »
Tonne
The tonne (Non-SI unit, symbol: t), commonly referred to as the metric ton in the United States, is a non-SI metric unit of mass equal to 1,000 kilograms;.
New!!: Helium and Tonne · See more »
Tracer-gas leak testing
A tracer-gas leak testing method is a nondestructive testing method that detects gas leaks.
New!!: Helium and Tracer-gas leak testing · See more »
Trimix (breathing gas)
Trimix is a breathing gas consisting of oxygen, helium and nitrogen and is often used in deep commercial diving, during the deep phase of dives carried out using technical diving techniques, and in advanced recreational diving.
New!!: Helium and Trimix (breathing gas) · See more »
Triple-alpha process
The triple-alpha process is a set of nuclear fusion reactions by which three helium-4 nuclei (alpha particles) are transformed into carbon.
New!!: Helium and Triple-alpha process · See more »
Tritium
Tritium (or; symbol or, also known as hydrogen-3) is a radioactive isotope of hydrogen.
New!!: Helium and Tritium · See more »
Turbulence
In fluid dynamics, turbulence or turbulent flow is any pattern of fluid motion characterized by chaotic changes in pressure and flow velocity.
New!!: Helium and Turbulence · See more »
TV Asahi
, also known as EX and, is a Japanese television network with its headquarters in Roppongi, Minato, Tokyo, Japan.
New!!: Helium and TV Asahi · See more »
Ullage
Ullage or headspace is the unfilled space in a container, particularly with a liquid.
New!!: Helium and Ullage · See more »
United States Bureau of Mines
For most of the 20th century, the United States Bureau of Mines (USBM) was the primary United States government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
New!!: Helium and United States Bureau of Mines · See more »
United States Congress
The United States Congress is the bicameral legislature of the Federal government of the United States.
New!!: Helium and United States Congress · See more »
United States Department of the Interior
The United States Department of the Interior (DOI) is the United States federal executive department of the U.S. government responsible for the management and conservation of most federal lands and natural resources, and the administration of programs relating to Native Americans, Alaska Natives, Native Hawaiians, territorial affairs, and insular areas of the United States.
New!!: Helium and United States Department of the Interior · See more »
United States Navy
The United States Navy (USN) is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States.
New!!: Helium and United States Navy · See more »
United States Senate
The United States Senate is the upper chamber of the United States Congress, which along with the United States House of Representatives—the lower chamber—comprise the legislature of the United States.
New!!: Helium and United States Senate · See more »
Universe
The Universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.
New!!: Helium and Universe · See more »
University of Alberta
The University of Alberta (also known as U of A and UAlberta) is a public research university located in Edmonton, Alberta, Canada.
New!!: Helium and University of Alberta · See more »
University of Kansas
The University of Kansas, also referred to as KU or Kansas, is a public research university in the U.S. state of Kansas.
New!!: Helium and University of Kansas · See more »
Uppsala
Uppsala (older spelling Upsala) is the capital of Uppsala County and the fourth largest city of Sweden, after Stockholm, Gothenburg and Malmö.
New!!: Helium and Uppsala · See more »
Uraninite
Uraninite, formerly pitchblende, is a radioactive, uranium-rich mineral and ore with a chemical composition that is largely UO2, but due to oxidation the mineral typically contains variable proportions of U3O8.
New!!: Helium and Uraninite · See more »
Uranium
Uranium is a chemical element with symbol U and atomic number 92.
New!!: Helium and Uranium · See more »
USS Shenandoah (ZR-1)
USS Shenandoah was the first of four United States Navy rigid airships.
New!!: Helium and USS Shenandoah (ZR-1) · See more »
Vacuum flask
A vacuum flask (also known as a Dewar flask, Dewar bottle or thermos) is an insulating storage vessel that greatly lengthens the time over which its contents remain hotter or cooler than the flask's surroundings.
New!!: Helium and Vacuum flask · See more »
Valence (chemistry)
In chemistry, the valence or valency of an element is a measure of its combining power with other atoms when it forms chemical compounds or molecules.
New!!: Helium and Valence (chemistry) · See more »
Valence and conduction bands
In solid-state physics, the valence band and conduction band are the bands closest to the Fermi level and thus determine the electrical conductivity of the solid.
New!!: Helium and Valence and conduction bands · See more »
Van der Waals force
In molecular physics, the van der Waals forces, named after Dutch scientist Johannes Diderik van der Waals, are distance-dependent interactions between atoms or molecules.
New!!: Helium and Van der Waals force · See more »
Van der Waals molecule
A van der Waals molecule is a weakly bound complex of atoms or molecules held together by intermolecular attractions such as van der Waals forces or by hydrogen bonds.
New!!: Helium and Van der Waals molecule · See more »
Viscosity
The viscosity of a fluid is the measure of its resistance to gradual deformation by shear stress or tensile stress.
New!!: Helium and Viscosity · See more »
Vocal tract
The vocal tract is the cavity in human beings and in animals where the sound produced at the sound source (larynx in mammals; syrinx in birds) is filtered.
New!!: Helium and Vocal tract · See more »
Voltage
Voltage, electric potential difference, electric pressure or electric tension (formally denoted or, but more often simply as V or U, for instance in the context of Ohm's or Kirchhoff's circuit laws) is the difference in electric potential between two points.
New!!: Helium and Voltage · See more »
Wafer (electronics)
A wafer, also called a slice or substrate, is a thin slice of semiconductor material, such as a crystalline silicon, used in electronics for the fabrication of integrated circuits and in photovoltaics for conventional, wafer-based solar cells.
New!!: Helium and Wafer (electronics) · See more »
Wave equation
The wave equation is an important second-order linear partial differential equation for the description of waves—as they occur in classical physics—such as mechanical waves (e.g. water waves, sound waves and seismic waves) or light waves.
New!!: Helium and Wave equation · See more »
Wavelength
In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats.
New!!: Helium and Wavelength · See more »
Welding
Welding is a fabrication or sculptural process that joins materials, usually metals or thermoplastics, by causing fusion, which is distinct from lower temperature metal-joining techniques such as brazing and soldering, which do not melt the base metal.
New!!: Helium and Welding · See more »
Willem Hendrik Keesom
He also developed the first mathematical description of dipole-dipole interactions in 1921.
New!!: Helium and Willem Hendrik Keesom · See more »
William Crookes
Sir William Crookes (17 June 1832 – 4 April 1919) was a British chemist and physicist who attended the Royal College of Chemistry in London, and worked on spectroscopy.
New!!: Helium and William Crookes · See more »
William Francis Hillebrand
William Francis Hillebrand (December 12, 1853 – February 7, 1925) was an American chemist.
New!!: Helium and William Francis Hillebrand · See more »
William Ramsay
Sir William Ramsay (2 October 1852 – 23 July 1916) was a Scottish chemist who discovered the noble gases and received the Nobel Prize in Chemistry in 1904 "in recognition of his services in the discovery of the inert gaseous elements in air" (along with his collaborator, John William Strutt, 3rd Baron Rayleigh, who received the Nobel Prize in Physics that same year for their discovery of argon).
New!!: Helium and William Ramsay · See more »
Wolf–Rayet star
Wolf–Rayet stars, often abbreviated as WR stars, are a rare heterogeneous set of stars with unusual spectra showing prominent broad emission lines of highly ionised helium and nitrogen or carbon.
New!!: Helium and Wolf–Rayet star · See more »
Wyoming
Wyoming is a state in the mountain region of the western United States.
New!!: Helium and Wyoming · See more »
Xenon
Xenon is a chemical element with symbol Xe and atomic number 54.
New!!: Helium and Xenon · See more »
Zeppelin
A Zeppelin is a type of rigid airship named after the German Count Ferdinand von Zeppelin who pioneered rigid airship development at the beginning of the 20th century.
New!!: Helium and Zeppelin · See more »
Zero-point energy
Zero-point energy (ZPE) or ground state energy is the lowest possible energy that a quantum mechanical system may have.
New!!: Helium and Zero-point energy · See more »
Zeta Puppis
Zeta Puppis (ζ Puppis, abbreviated Zeta Pup, ζ Pup), also named Naos, is a star in the constellation of Puppis.
New!!: Helium and Zeta Puppis · See more »
Zirconium
Zirconium is a chemical element with symbol Zr and atomic number 40.
New!!: Helium and Zirconium · See more »
1-K pot
A 1-K pot (i.e. 1-kelvin pot) is a cryogenic device used to attain temperatures down to approximately 1 kelvin.
New!!: Helium and 1-K pot · See more »
2017–18 Qatar diplomatic crisis
The 2017–18 Qatar diplomatic crisis began when several countries abruptly cut off diplomatic relations with Qatar in June 2017.
New!!: Helium and 2017–18 Qatar diplomatic crisis · See more »
3B Junior
is the idol training department of the third section of the entertainment company Stardust Promotion.
New!!: Helium and 3B Junior · See more »
Redirects here:
ATC code V03AN03, ATCvet code QV03AN03, Atomic number 2, Balloon grade helium, E939, Element 2, He (element), Helium II, Helium gas, Helium shortage, Helium voice, Inhaling Helium, Solid Helium, Superfluid helium, Two fluid model for helium.
References
[1] https://en.wikipedia.org/wiki/Helium
