Table of Contents
379 relations: Abiogenic petroleum origin, Abraham Langlet, Absolute zero, Abundance of the chemical elements, Acid, Activated carbon, Air embolism, Air Liquide, Air Products, Airship, Alfred Fowler, Alkaline earth metal, Alpha decay, Alpha particle, Aluminium, Amarillo, Texas, American Institute of Physics, Angstrom, 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, Balloon, Barcode reader, Barotrauma, Barrage balloon, Baryon, BBC, BBC Online, Beryllium, Beryllium-8, Beta decay, Beta particle, Big Bang, Big Bang nucleosynthesis, Binding energy, Birkeland current, ... Expand index (329 more) »
- Airship technology
- Coolants
- Helios
- Noble gases
- Nuclear reactor coolants
- Quantum phases
- Underwater diving equipment
Abiogenic petroleum origin
The abiogenic petroleum origin hypothesis proposes that most of earth's petroleum and natural gas deposits were formed inorganically, commonly known as abiotic oil.
See Helium and Abiogenic petroleum origin
Abraham Langlet
Nils Abraham Langlet (9 July 1868 – 30 March 1936; known by his second given name) was a Swedish chemist.
See Helium and Abraham Langlet
Absolute zero
Absolute zero is the lowest 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 zero kelvin.
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.
See Helium and Abundance of the chemical elements
Acid
An acid is a molecule or ion capable of either donating a proton (i.e. hydrogen ion, H+), known as a Brønsted–Lowry acid, or forming a covalent bond with an electron pair, known as a Lewis acid.
See Helium and Acid
Activated carbon
Activated carbon, also called activated charcoal, is a form of carbon commonly used to filter contaminants from water and air, among many other uses.
See Helium and Activated carbon
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.
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.
Air Products
Air Products and Chemicals, Inc. is an American international corporation whose principal business is selling gases and chemicals for industrial use.
Airship
An airship is a type of aerostat or lighter-than-air aircraft that can navigate through the air flying under its own power.
Alfred Fowler
Alfred Fowler, CBE FRS (22 March 1868, in Yorkshire – 24 June 1940) was an English astronomer and spectroscopist.
Alkaline earth metal
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See Helium and Alkaline earth metal
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 a different atomic nucleus, with a mass number that is reduced by four and an atomic number that is reduced by two.
Alpha particle
Alpha particles, also called alpha rays or alpha radiation, consist of two protons and two neutrons bound together into a particle identical to a helium-4 nucleus.
Aluminium
Aluminium (Aluminum in North American English) is a chemical element; it has symbol Al and atomic number 13. Helium and Aluminium are airship technology, chemical elements and e-number additives.
Amarillo, Texas
Amarillo (Spanish for "yellow") is a city in the U.S. state of Texas and the seat of Potter County.
See Helium and Amarillo, Texas
American Institute of Physics
The American Institute of Physics (AIP) promotes science and the profession of physics, publishes physics journals, and produces publications for scientific and engineering societies.
See Helium and American Institute of Physics
Angstrom
The angstrom is a unit of length equal to m; that is, one ten-billionth of a metre, a hundred-millionth of a centimetre, 0.1 nanometre, or 100 picometres.
Annalen der Physik
Annalen der Physik (English: Annals of Physics) is one of the oldest scientific journals on physics; it has been published since 1799.
See Helium and Annalen der Physik
Apollo program
The Apollo program, also known as Project Apollo, was the United States human spaceflight program carried out by the National Aeronautics and Space Administration (NASA), which succeeded in preparing and landing the first men on the Moon from 1968 to 1972.
Arc welding
Arc welding is a welding 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.
Argon
Argon is a chemical element; it has symbol Ar and atomic number 18. Helium and Argon are chemical elements, e-number additives and noble gases.
See Helium and Argon
Argon fluorohydride
Argon fluorohydride (systematically named fluoridohydridoargon) or argon hydrofluoride is an inorganic compound with the chemical formula HArF (also written ArHF).
See Helium and Argon fluorohydride
Arzew
Arzew or Arzeu (أرزيو) is a port city in Algeria, 25 miles (40 km) from Oran.
See Helium and Arzew
Asphyxiant gas
An asphyxiant gas, also known as a simple asphyxiant, is a nontoxic or minimally toxic gas which reduces or displaces the normal oxygen concentration in breathing air.
Asteroid
An asteroid is a minor planet—an object that is neither a true planet nor an identified comet— that orbits within the inner Solar System.
Astronomische Nachrichten
Astronomische Nachrichten (Astronomical Notes), one of the first international journals in the field of astronomy, was established in 1821 by the German astronomer Heinrich Christian Schumacher.
See Helium and Astronomische Nachrichten
Atmosphere
An atmosphere is a layer of gasses that envelop an astronomical object, held in place by the gravity of the object.
Atmosphere of Earth
The atmosphere of Earth is composed of a layer of gas mixture that surrounds the Earth's planetary surface (both lands and oceans), known collectively as air, with variable quantities of suspended aerosols and particulates (which create weather features such as clouds and hazes), all retained by Earth's gravity.
See Helium and Atmosphere of Earth
Atmospheric escape
Atmospheric escape is the loss of planetary atmospheric gases to outer space.
See Helium and Atmospheric escape
Atom
Atoms are the basic particles of the chemical elements.
See Helium and Atom
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.
Atomic number
The atomic number or nuclear charge number (symbol Z) of a chemical element is the charge number of an atomic nucleus.
Atomic orbital
In quantum mechanics, an atomic orbital is a function describing the location and wave-like behavior of an electron in an atom.
Aurora
An aurora (aurorae or auroras), also commonly known as the northern lights (aurora borealis) or southern lights (aurora australis), is a natural light display in Earth's sky, predominantly seen in high-latitude regions (around the Arctic and Antarctic).
Balloon
A balloon is a flexible membrane bag that can be inflated with a gas, such as helium, hydrogen, nitrous oxide, oxygen, or air.
Barcode reader
A barcode reader or barcode scanner is an optical scanner that can read printed barcodes and send the data they contain to computer.
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 liquid.
Barrage balloon
A barrage balloon is a type of airborne barrage, a large uncrewed tethered balloon used to defend ground targets against aircraft attack, by raising aloft steel cables which pose a severe risk of collision to hostile aircraft, making the attacker's approach difficult and hazardous.
See Helium and Barrage balloon
Baryon
In particle physics, a baryon is a type of composite subatomic particle, including the proton and the neutron, that contains an odd number of valence quarks, conventionally three.
BBC
The British Broadcasting Corporation (BBC) is a British public service broadcaster headquartered at Broadcasting House in London, England.
See Helium and BBC
BBC Online
BBC Online, formerly known as BBCi, is the BBC's online service.
Beryllium
Beryllium is a chemical element; it has symbol Be and atomic number 4. Helium and Beryllium are chemical elements.
Beryllium-8
Beryllium-8 (8Be, Be-8) is a radionuclide with 4 neutrons and 4 protons.
Beta decay
In nuclear physics, beta decay (β-decay) is a type of radioactive decay in which an atomic nucleus emits a beta particle (fast energetic electron or positron), transforming into an isobar of that nuclide.
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.
Big Bang
The Big Bang is a physical theory that describes how the universe expanded from an initial state of high density and temperature.
Big Bang nucleosynthesis
In physical cosmology, Big Bang nucleosynthesis (also known as primordial nucleosynthesis, and abbreviated as BBN) is 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.
See Helium and Big Bang nucleosynthesis
Binding energy
In physics and chemistry, binding energy is the smallest amount of energy required to remove a particle from a system of particles or to disassemble a system of particles into individual parts.
Birkeland current
A Birkeland current (also known as field-aligned current) is a set of electrical currents that flow along geomagnetic field lines connecting the Earth's magnetosphere to the Earth's high latitude ionosphere.
See Helium and Birkeland current
Bohr model
In atomic physics, the Bohr model or Rutherford–Bohr model is an obsolete model of the atom, presented by Niels Bohr and Ernest Rutherford in 1913.
Boiling point
The boiling point of a substance is the temperature at which the vapor pressure of a liquid equals the pressure surrounding the liquid and the liquid changes into a vapor.
Bolling Air Force Base
Bolling Air Force Base or Bolling AFB 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.
See Helium and Bolling Air Force Base
Boron
Boron is a chemical element; it has symbol B and atomic number 5. Helium and Boron are chemical elements.
See Helium and Boron
Bose–Einstein condensate
In condensed matter physics, a Bose–Einstein condensate (BEC) is a state of matter that is typically formed when a gas of bosons at very low densities is cooled to temperatures very close to absolute zero (−273.15 °C or −459.67 °F or 0 K).
See Helium and Bose–Einstein condensate
Boson
In particle physics, a boson is a subatomic particle whose spin quantum number has an integer value (0, 1, 2,...). Bosons form one of the two fundamental classes of subatomic particle, the other being fermions, which have odd half-integer spin (...). Every observed subatomic particle is either a boson or a fermion.
See Helium and Boson
Brønsted–Lowry acid–base theory
The Brønsted–Lowry theory (also called proton theory of acids and bases) is an acid–base reaction theory which was first developed by Johannes Nicolaus Brønsted and Thomas Martin Lowry independently in 1923.
See Helium and Brønsted–Lowry acid–base theory
Bulk modulus
The bulk modulus (K or B or k) of a substance is a measure of the resistance of a substance to bulk compression.
Bushton, Kansas
Bushton is a city in Rice County, Kansas, United States.
See Helium and Bushton, Kansas
C-class blimp
The C-class blimp was a patrol airship developed by the US Navy near the end of World War I, a systematic improvement upon the B-type which was suitable for training, but of limited value for patrol work.
Cambridge University Press
Cambridge University Press is the university press of the University of Cambridge.
See Helium and Cambridge University Press
Carbon tetrafluoride
Tetrafluoromethane, also known as carbon tetrafluoride or R-14, is the simplest perfluorocarbon (CF4).
See Helium and Carbon tetrafluoride
Carnotite
Carnotite is a potassium uranium vanadate radioactive mineral with chemical formula K2(UO2)2(VO4)2·3H2O.
CERN
The European Organization for Nuclear Research, known as CERN (Conseil européen pour la Recherche nucléaire), is an intergovernmental organization that operates the largest particle physics laboratory in the world.
See Helium and CERN
Chemical compound
A chemical compound is a chemical substance composed of many identical molecules (or molecular entities) containing atoms from more than one chemical element held together by chemical bonds.
See Helium and Chemical compound
Chemical element
A chemical element is a chemical substance that cannot be broken down into other substances by chemical reactions. Helium and chemical element are chemical elements.
See Helium and Chemical element
Chemical symbol
Chemical symbols are the abbreviations used in chemistry, mainly for chemical elements; but also for functional groups, chemical compounds, and other entities. Helium and chemical symbol are chemical elements.
See Helium and Chemical symbol
Chemically inert
In chemistry, the term chemically inert is used to describe a substance that is not chemically reactive. Helium and chemically inert are noble gases.
See Helium and Chemically inert
Chemistry World
Chemistry World is a monthly chemistry news magazine published by the Royal Society of Chemistry.
See Helium and Chemistry World
China
China, officially the People's Republic of China (PRC), is a country in East Asia.
See Helium and China
Chromosphere
A chromosphere ("sphere of color") is the second layer of a star's atmosphere, located above the photosphere and below the solar transition region and corona.
Classical physics
Classical physics is a group of physics theories that predate modern, more complete, or more widely applicable theories.
See Helium and Classical physics
Clathrate compound
A clathrate is a chemical substance consisting of a lattice that traps or contains molecules.
See Helium and Clathrate compound
Cleveite
Cleveite is an impure radioactive variety of uraninite containing uranium, found in Norway.
CNO cycle
The CNO cycle (for carbon–nitrogen–oxygen; sometimes called Bethe–Weizsäcker cycle after Hans Albrecht Bethe and Carl Friedrich von Weizsäcker) 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 (p–p cycle), which is more efficient at the Sun's core temperature.
Cold War
The Cold War was a period of geopolitical tension between the United States and the Soviet Union and their respective allies, the Western Bloc and the Eastern Bloc, that started in 1947, two years after the end of World War II, and lasted until the fall of the Soviet Union in 1991.
Coma
A coma is a deep state of prolonged unconsciousness in which a person cannot be awakened, fails to respond normally to painful stimuli, light, or sound, lacks a normal wake-sleep cycle and does not initiate voluntary actions.
See Helium and Coma
Combustibility and flammability
A combustible material is a material that can burn (i.e., sustain a flame) in air under certain conditions.
See Helium and Combustibility and flammability
Compressibility
In thermodynamics and fluid mechanics, the compressibility (also known as the coefficient of compressibility or, if the temperature is held constant, the isothermal compressibility) is a measure of the instantaneous relative volume change of a fluid or solid as a response to a pressure (or mean stress) change.
See Helium and Compressibility
Computational chemistry
Computational chemistry is a branch of chemistry that uses computer simulations to assist in solving chemical problems.
See Helium and Computational chemistry
Cooper pair
In condensed matter physics, a Cooper pair or BCS pair (Bardeen–Cooper–Schrieffer 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. Helium and Cooper pair are quantum phases.
Copper
Copper is a chemical element; it has symbol Cu and atomic number 29. Helium and Copper are chemical elements.
Cosmic dust
Cosmic dustalso called extraterrestrial dust, space dust, or star dustis dust that occurs in outer space or has fallen onto Earth.
Cosmology
Cosmology is a branch of physics and metaphysics dealing with the nature of the universe, the cosmos.
Cryocooler
A refrigerator designed to reach cryogenic temperatures (below 120 K, -153 °C, -243.4 °F) is often called a cryocooler.
Cryogenics
In physics, cryogenics is the production and behaviour of materials at very low temperatures.
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.
Cubic crystal system
In crystallography, the cubic (or isometric) crystal system is a crystal system where the unit cell is in the shape of a cube.
See Helium and Cubic crystal system
Cyanosis
Cyanosis is the change of body tissue color to a bluish-purple hue, as a result of decrease in the amount of oxygen bound to the hemoglobin in the red blood cells of the capillary bed.
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." Lee is professor emeritus of physics at Cornell University and distinguished professor of physics at Texas A&M University.
See Helium and David Lee (physicist)
Deep diving
Deep diving is underwater diving to a depth beyond the norm accepted by the associated community.
Density
Density (volumetric mass density or specific mass) is a substance's mass per unit of volume.
Deuterium
Deuterium (hydrogen-2, symbol H or D, also known as heavy hydrogen) is one of two stable isotopes of hydrogen (the other is protium, or hydrogen-1).
Dexter, Kansas
Dexter is a city in Cowley County, Kansas, United States.
Diamond anvil cell
A diamond anvil cell (DAC) is a high-pressure device used in geology, engineering, and materials science experiments.
See Helium and Diamond anvil cell
Diffusion
Diffusion is the net movement of anything (for example, atoms, ions, molecules, energy) generally from a region of higher concentration to a region of lower concentration.
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.
See Helium and Dilution refrigerator
Discovery of chemical elements
The discoveries of the 118 chemical elements known to exist as of 2024 are presented here in chronological order.
See Helium and Discovery of chemical elements
Disodium helide
Disodium helide (Na2He) is a compound of helium and sodium that is stable at high pressures above.
See Helium and Disodium helide
Douglas Osheroff
Douglas Dean Osheroff (born August 1, 1945) is an American physicist known for his work in experimental condensed matter physics, in particular for his co-discovery of superfluidity in Helium-3.
See Helium and Douglas Osheroff
Eagle Point, Oregon
Eagle Point is a city in Jackson County, Oregon, United States.
See Helium and Eagle Point, Oregon
East African Rift
The East African Rift (EAR) or East African Rift System (EARS) is an active continental rift zone in East Africa.
See Helium and East African Rift
Edward Charles Pickering
Edward Charles Pickering (July 19, 1846 – February 3, 1919) was an American astronomer and physicist and the older brother of William Henry Pickering.
See Helium and Edward Charles Pickering
Edward Frankland
Sir Edward Frankland, (18 January 18259 August 1899) was an English chemist.
See Helium and Edward Frankland
Effective nuclear charge
In atomic physics, the effective nuclear charge is the actual amount of positive (nuclear) charge experienced by an electron in a multi-electron atom.
See Helium and Effective nuclear charge
Electride
An electride is an ionic compound in which an electron serves the role of the anion.
Elsevier
Elsevier is a Dutch academic publishing company specializing in scientific, technical, and medical content.
Emission spectrum
The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to electrons making a transition from a high energy state to a lower energy state.
See Helium and Emission spectrum
Endohedral fullerene
Endohedral fullerenes, also called endofullerenes, are fullerenes that have additional atoms, ions, or clusters enclosed within their inner spheres.
See Helium and Endohedral fullerene
Energy level
A quantum mechanical system or particle that is bound—that is, confined spatially—can only take on certain discrete values of energy, called energy levels.
Erasmus Haworth
Erasmus Haworth (1855–1932) was an American geologist.
See Helium and Erasmus Haworth
Ernest Rutherford
Ernest Rutherford, 1st Baron Rutherford of Nelson, (30 August 1871 – 19 October 1937) was a New Zealand physicist who was a pioneering researcher in both atomic and nuclear physics.
See Helium and Ernest Rutherford
Evaporative cooler
An evaporative cooler (also known as evaporative air conditioner, swamp cooler, swamp box, desert cooler and wet air cooler) is a device that cools air through the evaporation of water.
See Helium and Evaporative cooler
Excimer
An excimer (originally short for excited dimer) is a short-lived polyatomic molecule formed from two species that do not form a stable molecule in the ground state.
Federal government of the United States
The federal government of the United States (U.S. federal government or U.S. government) is the national government of the United States, a federal republic located primarily in North America, composed of 50 states, five major self-governing territories, several island possessions, and the federal district/national capital of Washington, D.C., where most of the federal government is based.
See Helium and Federal government of the United States
Fermion
In particle physics, a fermion is a particle that follows Fermi–Dirac statistics.
Fire retardant
A fire retardant is a substance that is used to slow down or stop the spread of fire or reduce its intensity.
Fluorite
Fluorite (also called fluorspar) is the mineral form of calcium fluoride, CaF2.
Four Corners
The Four Corners is a region of the Southwestern United States consisting of the southwestern corner of Colorado, southeastern corner of Utah, northeastern corner of Arizona, and northwestern corner of New Mexico.
Fractional distillation
Fractional distillation is the separation of a mixture into its component parts, or fractions.
See Helium and Fractional distillation
Fraunhofer lines
The Fraunhofer lines are a set of spectral absorption lines.
See Helium and Fraunhofer lines
Frostbite
Frostbite is a skin injury that occurs when someone is exposed to extremely low temperatures, causing the freezing of the skin or other tissues, commonly affecting the fingers, toes, nose, ears, cheeks and chin areas.
Fullerene
A fullerene is an allotrope of carbon whose molecules consist of carbon atoms connected by single and double bonds so as to form a closed or partially closed mesh, with fused rings of five to seven atoms.
Fundamental frequency
The fundamental frequency, often referred to simply as the fundamental, is defined as the lowest frequency of a periodic waveform.
See Helium and Fundamental frequency
Fusion rocket
A fusion rocket is a theoretical design for a rocket driven by fusion propulsion that could provide efficient and sustained acceleration in space without the need to carry a large fuel supply.
Gallon
The gallon is a unit of volume in British imperial units and United States customary units.
Gas
Gas is one of the four fundamental states of matter.
See Helium and Gas
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.
See Helium and Gas chromatography
Georges Rayet
Georges-Antoine-Pons Rayet (12 December 1839 – 14 June 1906) was a French astronomer.
Germanium
Germanium is a chemical element; it has symbol Ge and atomic number 32. Helium and Germanium are chemical elements.
Glow discharge
A glow discharge is a plasma formed by the passage of electric current through a gas.
Government Accountability Office
The U.S. Government Accountability Office (GAO) is an independent, nonpartisan government agency within the legislative branch that provides auditing, evaluative, and investigative services for the United States Congress.
See Helium and Government Accountability Office
Gravity
In physics, gravity is a fundamental interaction which causes mutual attraction between all things that have mass.
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.
Great Plains
The Great Plains are a broad expanse of flatland in North America.
Ground state
The ground state of a quantum-mechanical system is its stationary state of lowest energy; the energy of the ground state is known as the zero-point energy of the system.
Guntur
Guntur is a city in the Indian state of Andhra Pradesh and the administrative headquarters of Guntur district.
Half-life
Half-life (symbol) is the time required for a quantity (of substance) to reduce to half of its initial value.
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.
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.
Hampton Roads
Hampton Roads is the name of both a body of water in the United States that serves as a wide channel for the James, Nansemond, and Elizabeth rivers between Old Point Comfort and Sewell's Point near where the Chesapeake Bay flows into the Atlantic Ocean, and the surrounding metropolitan region located in the southeastern Virginia and northeastern North Carolina portions of the Tidewater Region.
Hard disk drive
A hard disk drive (HDD), hard disk, hard drive, or fixed disk is an electro-mechanical data storage device that stores and retrieves digital data using magnetic storage with one or more rigid rapidly rotating platters coated with magnetic material.
See Helium and Hard disk drive
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.
See Helium and Harvard College Observatory
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.
See Helium and Harvard University Press
Heat capacity ratio
In thermal physics and thermodynamics, the heat capacity ratio, also known as the adiabatic index, the ratio of specific heats, or Laplace's coefficient, is the ratio of the heat capacity at constant pressure to heat capacity at constant volume.
See Helium and Heat capacity ratio
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.
Heike Kamerlingh Onnes
Heike Kamerlingh Onnes (21 September 185321 February 1926) was a Dutch physicist and Nobel laureate.
See Helium and Heike Kamerlingh Onnes
Helios
In ancient Greek religion and mythology, Helios (Ἥλιος ||Sun; Homeric Greek: Ἠέλιος) is the god who personifies the Sun.
Heliox
Heliox is a breathing gas mixture of helium (He) and oxygen (O2).
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.
See Helium and Helium Act of 1925
Helium cryogenics
In the field of cryogenics, helium is utilized for a variety of reasons.
See Helium and Helium cryogenics
Helium dating
Helium dating may refer to the traditional uranium–thorium dating (abbreviated U–Th/He dating) or to a variety of He diffusion methods that utilize the mobility of He atoms to determine the thermal history of a rock.
Helium dimer
The helium dimer is a van der Waals molecule with formula He2 consisting of two helium atoms.
Helium mass spectrometer
A helium mass spectrometer is an instrument commonly used to detect and locate small leaks.
See Helium and Helium mass spectrometer
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.
See Helium and Helium Privatization Act of 1996
Helium-3
Helium-3 (3He see also helion) is a light, stable isotope of helium with two protons and one neutron.
Helium-3 refrigerator
A helium-3 refrigerator is a simple device used in experimental physics for obtaining temperatures down to about 0.2 kelvins.
See Helium and Helium-3 refrigerator
Helium-4
Helium-4 is a stable isotope of the element helium.
Helium–neon laser
A helium–neon laser or He-Ne laser is a type of gas laser whose high energetic medium gain medium consists of a mixture of ratio (between 5:1 and 20:1) of helium and neon at a total pressure of approximately 1 Torr (133 Pa) inside a small electrical discharge.
See Helium and Helium–neon laser
Helsinki University of Technology
Helsinki University of Technology (TKK; Teknillinen korkeakoulu; Tekniska högskolan) was a technical university in Finland.
See Helium and Helsinki University of Technology
Heterosphere
The heterosphere is the layer of an atmosphere where the gases are separated out by molecular diffusion with increasing altitude such that lighter species become more abundant relative to heavier species.
High-pressure nervous syndrome
High-pressure nervous syndrome (HPNS – also known as high-pressure neurological syndrome) is a neurological and physiological diving disorder which can result when a diver descends below about using a breathing gas containing helium.
See Helium and High-pressure nervous syndrome
Hindenburg disaster
The Hindenburg disaster was an airship accident that occurred on May 6, 1937, in Manchester Township, New Jersey, U.S. The LZ 129 ''Hindenburg'' (Luftschiff Zeppelin #129; Registration: D-LZ 129) was a 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.
See Helium and Hindenburg disaster
Historical Studies in the Natural Sciences
Historical Studies in the Natural Sciences is a peer-reviewed academic journal published by the University of California Press on behalf of the Office for History of Science and Technology (University of California, Berkeley).
See Helium and Historical Studies in the Natural Sciences
Hugoton Gas Field
Hugoton Gas Field is a large natural gas field in the U.S. states of Kansas, Oklahoma, and Texas.
See Helium and Hugoton Gas Field
Human voice
The human voice consists of sound made by a human being using the vocal tract, including talking, singing, laughing, crying, screaming, shouting, humming or yelling.
Hydrogen
Hydrogen is a chemical element; it has symbol H and atomic number 1. Helium and Hydrogen are airship technology, chemical elements and e-number additives.
Hydrogen atom
A hydrogen atom is an atom of the chemical element hydrogen.
Ideal gas
An ideal gas is a theoretical gas composed of many randomly moving point particles that are not subject to interparticle interactions.
Impulse facility
An impulse facility is 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.
See Helium and Impulse facility
Inert gas
An inert gas is a gas that does not readily undergo chemical reactions with other chemical substances and therefore does not readily form chemical compounds. Helium and inert gas are noble gases.
Insulator (electricity)
An electrical insulator is a material in which electric current does not flow freely.
See Helium and Insulator (electricity)
Interstellar medium
The interstellar medium (ISM) is the matter and radiation that exists in the space between the star systems in a galaxy.
See Helium and Interstellar medium
Ion
An ion is an atom or molecule with a net electrical charge.
See Helium and Ion
Ionization energy
In physics and chemistry, ionization energy (IE) is the minimum energy required to remove the most loosely bound electron of an isolated gaseous atom, positive ion, or molecule.
See Helium and Ionization energy
Isotope
Isotopes are distinct nuclear species (or nuclides) of the same chemical element.
Isotopes of helium
Although there are nine known isotopes of helium (2He) (standard atomic weight), only helium-3 and helium-4 are stable.
See Helium and Isotopes of helium
Joule–Thomson effect
In thermodynamics, the Joule–Thomson effect (also known as the Joule–Kelvin effect or Kelvin–Joule effect) describes the temperature change of a ''real'' gas or liquid (as differentiated from an ideal gas) when it is forced by a pressure difference through a valve or porous plug while keeping it insulated so that no heat is exchanged with the environment.
See Helium and Joule–Thomson effect
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.
See Helium and Journal of the American Chemical Society
Jupiter
Jupiter is the fifth planet from the Sun and the largest in the Solar System.
Kainosymmetry
Kainosymmetry (from Greek καινός "new") describes the first atomic orbital of each azimuthal quantum number (ℓ).
Kansas
Kansas is a landlocked state in the Midwestern region of the United States.
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).
Laminar flow
Laminar flow is the property of fluid particles in fluid dynamics to follow smooth paths in layers, with each layer moving smoothly past the adjacent layers with little or no mixing.
Large Hadron Collider
The Large Hadron Collider (LHC) is the world's largest and highest-energy particle collider.
See Helium and Large Hadron Collider
Laser diode
The laser diode chip removed and placed on the eye of a needle for scale A laser diode (LD, also injection laser diode or ILD or semiconductor laser or diode laser) is a semiconductor device similar to a light-emitting diode in which a diode pumped directly with electrical current can create lasing conditions at the diode's junction.
Laser pointer
A laser pointer or laser pen is a (typically battery-powered) handheld device that uses a laser diode to emit a narrow low-power visible laser beam (i.e. coherent light) to highlight something of interest with a small bright colored spot.
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.
See Helium and Leak
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.
Leidenfrost effect
The Leidenfrost effect is a physical phenomenon in which a liquid, close to a solid surface of another body that is significantly hotter than the liquid's boiling point, produces an insulating vapor layer that keeps the liquid from boiling rapidly.
See Helium and Leidenfrost effect
Lens
A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction.
See Helium and Lens
Lifting gas
A lifting gas or lighter-than-air gas is a gas that has a density lower than normal atmospheric gases and rises above them as a result, making it useful in lifting lighter-than-air aircraft. Helium and lifting gas are airship technology.
Liquefaction of gases
Liquefaction of gases is physical conversion of a gas into a liquid state (condensation).
See Helium and Liquefaction of gases
Liquid helium
Liquid helium is a physical state of helium at very low temperatures at standard atmospheric pressures. Helium and Liquid helium are Coolants and noble gases.
Liquid nitrogen
Liquid nitrogen (LN2) is nitrogen in a liquid state at low temperature. Helium and liquid nitrogen are Coolants.
See Helium and Liquid nitrogen
Lithium
Lithium is a chemical element; it has symbol Li and atomic number 3. Helium and Lithium are chemical elements.
Lithium helide
Lithium helide is a compound of helium and lithium with the formula LiHe.
Lithosphere
A lithosphere is the rigid, outermost rocky shell of a terrestrial planet or natural satellite.
Luigi Palmieri
Luigi Palmieri (22 April 1807 – 9 September 1896) was an Italian physicist and meteorologist.
Macroscopic quantum phenomena
Macroscopic quantum phenomena are processes showing quantum behavior at the macroscopic scale, rather than at the atomic scale where quantum effects are prevalent. Helium and macroscopic quantum phenomena are quantum phases.
See Helium and Macroscopic quantum phenomena
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 inside the body.
See Helium and Magnetic resonance imaging
Magnetosphere
In astronomy and planetary science, a magnetosphere is a region of space surrounding an astronomical object in which charged particles are affected by that object's magnetic field.
Manhattan Project
The Manhattan Project was a research and development program undertaken during World War II to produce the first nuclear weapons.
See Helium and Manhattan Project
Mantle (geology)
A mantle is a layer inside a planetary body bounded below by a core and above by a crust.
See Helium and Mantle (geology)
Mass number
The mass number (symbol A, from the German word: Atomgewicht, "atomic weight"), also called atomic mass number or nucleon number, is the total number of protons and neutrons (together known as nucleons) in an atomic nucleus.
Matter
In classical physics and general chemistry, matter is any substance that has mass and takes up space by having volume.
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.
See Helium and Max Planck Institute for Gravitational Physics
Melting point
The melting point (or, rarely, liquefaction point) of a substance is the temperature at which it changes state from solid to liquid.
MEMS
MEMS (micro-electromechanical systems) is the technology of microscopic devices incorporating both electronic and moving parts.
See Helium and MEMS
Meteoric iron
Meteoric iron, sometimes meteoritic iron, is a native metal and early-universe protoplanetary-disk remnant found in meteorites and made from the elements iron and nickel, mainly in the form of the mineral phases kamacite and taenite.
Methane
Methane is a chemical compound with the chemical formula (one carbon atom bonded to four hydrogen atoms).
Monatomic gas
In physics and chemistry, "monatomic" is a combination of the words "mono" and "atomic", and means "single atom".
Monazite
Monazite is a primarily reddish-brown phosphate mineral that contains rare-earth elements.
Monazite-(Ce)
Monazite-(Ce) (CePO4) is the most common representative of the monazite group.
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society (MNRAS) is a peer-reviewed scientific journal in astronomy, astrophysics and related fields.
See Helium and Monthly Notices of the Royal Astronomical Society
Moon
The Moon is Earth's only natural satellite.
See Helium and Moon
Mount Vesuvius
Mount Vesuvius is a somma–stratovolcano located on the Gulf of Naples in Campania, Italy, about east of Naples and a short distance from the shore.
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.
Nanometre
molecular scale. 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 International System of Units (SI), equal to one billionth (short scale) of a meter (0.000000001 m) and to 1000 picometres.
NASA
The National Aeronautics and Space Administration (NASA) is an independent agency of the U.S. federal government responsible for the civil space program, aeronautics research, and space research.
See Helium and NASA
National Helium Reserve
The National Helium Reserve, also known as the Federal Helium Reserve, is a strategic reserve of the United States, which once held over 1 billion cubic meters (about 170,000,000 kg) of helium gas.
See Helium and National Helium Reserve
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.
See Helium and National Weather Service
Natural gas
Natural gas (also called fossil gas, methane gas or simply gas) is a naturally occurring mixture of gaseous hydrocarbons consisting primarily of methane (95%) in addition to various smaller amounts of other higher alkanes.
Nature (journal)
Nature is a British weekly scientific journal founded and based in London, England.
See Helium and Nature (journal)
Naval Aircraft Factory
The Naval Aircraft Factory (NAF) was established by the United States Navy in 1918 in Philadelphia, Pennsylvania.
See Helium and Naval Aircraft Factory
Neon
Neon is a chemical element; it has symbol Ne and atomic number 10. Helium and Neon are chemical elements, Coolants and noble gases.
See Helium and Neon
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.
Ningxia
Ningxia, officially the Ningxia Hui Autonomous Region, is an autonomous region in Northwestern China.
Nitrogen
Nitrogen is a chemical element; it has symbol N and atomic number 7. Helium and Nitrogen are chemical elements, Coolants and e-number additives.
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.
See Helium and Nitrogen narcosis
Noble gas
|- ! colspan. Helium and Noble gas are noble gases.
Norman Lockyer
Sir Joseph Norman Lockyer (17 May 1836 – 16 August 1920) was an English scientist and astronomer.
Nuclear astrophysics
Nuclear astrophysics is an interdisciplinary part of both nuclear physics and astrophysics, involving close collaboration among researchers in various subfields of each of these fields.
See Helium and Nuclear astrophysics
Nuclear binding energy
Nuclear binding energy in experimental physics is the minimum energy that is required to disassemble the nucleus of an atom into its constituent protons and neutrons, known collectively as nucleons.
See Helium and Nuclear binding energy
Nuclear drip line
The nuclear drip line is the boundary beyond which atomic nuclei are unbound with respect to the emission of a proton or neutron.
See Helium and Nuclear drip line
Nuclear fusion
Nuclear fusion is a reaction in which two or more atomic nuclei, usually deuterium and tritium (hydrogen isotopes), combine to form one or more different atomic nuclei and subatomic particles (neutrons or protons).
Nuclear magnetic resonance
Nuclear magnetic resonance (NMR) is a physical phenomenon in which nuclei in a strong constant magnetic field are perturbed by a weak oscillating magnetic field (in the near field) and respond by producing an electromagnetic signal with a frequency characteristic of the magnetic field at the nucleus.
See Helium and Nuclear magnetic resonance
Nuclear magnetic resonance spectroscopy
Nuclear magnetic resonance spectroscopy, most commonly known as NMR spectroscopy or magnetic resonance spectroscopy (MRS), is a spectroscopic technique based on re-orientation of atomic nuclei with non-zero nuclear spins in an external magnetic field.
See Helium and Nuclear magnetic resonance spectroscopy
Nuclear reaction
In nuclear physics and nuclear chemistry, a nuclear reaction is a process in which two nuclei, or a nucleus and an external subatomic particle, collide to produce one or more new nuclides.
See Helium and Nuclear reaction
Nuclear reactor
A nuclear reactor is a device used to initiate and control a fission nuclear chain reaction or nuclear fusion reactions.
See Helium and Nuclear reactor
Nuclear shell model
In nuclear physics, atomic physics, and nuclear chemistry, the nuclear shell model utilizes the Pauli exclusion principle to model the structure of atomic nuclei in terms of energy levels.
See Helium and Nuclear shell model
Nucleon
In physics and chemistry, a nucleon is either a proton or a neutron, considered in its role as a component of an atomic nucleus.
Nucleosynthesis
Nucleosynthesis is the process that creates new atomic nuclei from pre-existing nucleons (protons and neutrons) and nuclei.
See Helium and Nucleosynthesis
Octafluorocyclobutane
Octafluorocyclobutane, or perfluorocyclobutane, C4F8, is an organofluorine compound which enjoys several niche applications.
See Helium and Octafluorocyclobutane
Ogg
Ogg is a free, open container format maintained by the Xiph.Org Foundation.
See Helium and Ogg
Oklahoma
Oklahoma (Choctaw: Oklahumma) is a state in the South Central region of the United States.
Oxygen
Oxygen is a chemical element; it has symbol O and atomic number 8. Helium and Oxygen are chemical elements and e-number additives.
Particle statistics
Particle statistics is a particular description of multiple particles in statistical mechanics.
See Helium and Particle statistics
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.
See Helium and Parts-per notation
Pascal (unit)
The pascal (symbol: Pa) is the unit of pressure in the International System of Units (SI).
Per Teodor Cleve
Per Teodor Cleve (10 February 1840 – 18 June 1905) was a Swedish chemist, biologist, mineralogist and oceanographer.
See Helium and Per Teodor Cleve
Periodic table
The periodic table, also known as the periodic table of the elements, is an ordered arrangement of the chemical elements into rows ("periods") and columns ("groups"). Helium and periodic table are chemical elements.
Periodic Videos
Periodic Videos (also known as The Periodic Table of Videos) is a video project and YouTube channel on chemistry.
See Helium and Periodic Videos
Petroleum reservoir
A petroleum reservoir or oil and gas reservoir is a subsurface accumulation of hydrocarbons contained in porous or fractured rock formations.
See Helium and Petroleum reservoir
Philosophical Magazine
The Philosophical Magazine is one of the oldest scientific journals published in English.
See Helium and Philosophical Magazine
Physics Today
Physics Today is the membership magazine of the American Institute of Physics.
Pickering series
The Pickering series (also known as the Pickering–Fowler series) consists of three lines of singly ionised helium found, usually in absorption, in the spectra of hot stars like Wolf–Rayet stars.
See Helium and Pickering series
Pierre Janssen
Pierre Jules César Janssen (22 February 1824 – 23 December 1907), usually 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, but there is no justification for the conclusion that he deserves credit for the co-discovery of the element helium.
Pitch (music)
Pitch is a perceptual property that allows sounds to be ordered 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.
Plasma (physics)
Plasma is one of four fundamental states of matter (the other three being solid, liquid, and gas) characterized by the presence of a significant portion of charged particles in any combination of ions or electrons.
See Helium and Plasma (physics)
Polystyrene
Polystyrene (PS) is a synthetic polymer made from monomers of the aromatic hydrocarbon styrene.
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.
Proceedings of the Royal Society
Proceedings of the Royal Society is the main research journal of the Royal Society.
See Helium and Proceedings of the Royal Society
Proton–proton chain
The proton–proton chain, also commonly referred to as the chain, is one of two known sets of nuclear fusion reactions by which stars convert hydrogen to helium.
See Helium and Proton–proton chain
Pyotr Kapitsa
Pyotr Leonidovich Kapitsa or Peter Kapitza (Пётр Леонидович Капица, Petre Capița; – 8 April 1984) was a leading Soviet physicist and Nobel laureate, whose research focused on low-temperature physics.
Qatar
Qatar (قطر) officially the State of Qatar, is a country in West Asia. It occupies the Qatar Peninsula on the northeastern coast of the Arabian Peninsula in the Middle East; it shares its sole land border with Saudi Arabia to the south, with the rest of its territory surrounded by the Persian Gulf.
See Helium and Qatar
Qatar diplomatic crisis
The Qatar diplomatic crisis was a high-profile incident involving the deterioration of ties between Qatar and the Arab League between 2017 and 2021.
See Helium and Qatar diplomatic crisis
QatarEnergy LNG
QatarEnergy LNG, formerly Qatargas, is the world's largest liquefied natural gas (LNG) company.
See Helium and QatarEnergy LNG
Quantum mechanics
Quantum mechanics is a fundamental theory that describes the behavior of nature at and below the scale of atoms.
See Helium and Quantum mechanics
Radioactive decay
Radioactive decay (also known as nuclear decay, radioactivity, radioactive disintegration, or nuclear disintegration) is the process by which an unstable atomic nucleus loses energy by radiation.
See Helium and Radioactive decay
Radiogenic nuclide
A radiogenic nuclide is a nuclide that is produced by a process of radioactive decay.
See Helium and Radiogenic nuclide
Rare-earth element
The rare-earth elements (REE), also called the rare-earth metals or rare earths or, in context, rare-earth oxides, and sometimes the lanthanides (although scandium and yttrium, which do not belong to this series, are usually included as rare earths), are a set of 17 nearly indistinguishable lustrous silvery-white soft heavy metals.
See Helium and Rare-earth element
Ras Laffan Industrial City
Ras Laffan Industrial City (Ra’s Lafān) is a Qatari industrial hub located north of Doha.
See Helium and Ras Laffan Industrial City
Refractive index
In optics, the refractive index (or refraction index) of an optical medium is a dimensionless number that gives the indication of the light bending ability of that medium.
See Helium and Refractive index
Regolith
Regolith is a blanket of unconsolidated, loose, heterogeneous superficial deposits covering solid rock.
Relative atomic mass
Relative atomic mass (symbol: A; sometimes abbreviated RAM or r.a.m.), also known by the deprecated synonym 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 the atomic mass constant.
See Helium and Relative atomic mass
Resonance
In physics, resonance refers to a wide class of phenomena that arise as a result of matching temporal or spatial periods of oscillatory objects.
Reynolds number
In fluid dynamics, the Reynolds number is a dimensionless quantity that helps predict fluid flow patterns in different situations by measuring the ratio between inertial and viscous forces.
See Helium and Reynolds number
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.
See Helium and Richard Threlfall
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.
See Helium and Robert Coleman Richardson
Rocket
A rocket (from bobbin/spool) is a vehicle that uses jet propulsion to accelerate without using any surrounding air.
Rocket propellant
Rocket propellant is the reaction mass of a rocket.
See Helium and Rocket propellant
Rollin film
A Rollin film, named after Bernard V. Rollin, is a -thick liquid film of helium in the helium II state.
Room temperature
Room temperature, colloquially, denotes the range of air temperatures most people find comfortable indoors while dressed in typical clothing.
See Helium and Room temperature
Royal Society of Chemistry
The Royal Society of Chemistry (RSC) is a learned society and professional association in the United Kingdom with the goal of "advancing the chemical sciences".
See Helium and Royal Society of Chemistry
Salient (geography)
A salient, panhandle, or bootheel is an elongated protrusion of a geopolitical entity, such as a subnational entity or a sovereign state.
See Helium and Salient (geography)
San Juan County, New Mexico
San Juan County (Condado de San Juan) is a county located in the U.S. state of New Mexico.
See Helium and San Juan County, New Mexico
Saturn V
The Saturn V is a retired American super heavy-lift launch vehicle developed by NASA under the Apollo program for human exploration of the Moon.
Second sound
In condensed matter physics, 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.
Semipermeable membrane
Semipermeable membrane is a type of synthetic or biologic, polymeric membrane that allows certain molecules or ions to pass through it by osmosis.
See Helium and Semipermeable membrane
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 (Metal Inert Gas) and TIG (Tungsten Inert Gas), respectively).
Silicon
Silicon is a chemical element; it has symbol Si and atomic number 14. Helium and Silicon are chemical elements.
Sintering
Sintering or frittage is the process of compacting and forming a solid mass of material by pressure or heat without melting it to the point of liquefaction.
Skikda
Skikda (سكيكدة; formerly Philippeville from 1838 to 1962 and Rusicade in ancient times) is a city in northeastern Algeria and a port on the Mediterranean.
Sodium
Sodium is a chemical element; it has symbol Na (from Neo-Latin natrium) and atomic number 11. Helium and Sodium are chemical elements, Coolants and nuclear reactor coolants.
Solar eclipse of August 18, 1868
A total solar eclipse occurred on August 18, 1868, also known as "The King of Siam's eclipse".
See Helium and Solar eclipse of August 18, 1868
Solar thermal collector
A solar thermal collector collects heat by absorbing sunlight.
See Helium and Solar thermal collector
Solar wind
The solar wind is a stream of charged particles released from the Sun's outermost atmospheric layer, the corona.
Solubility
In chemistry, solubility is the ability of a substance, the solute, to form a solution with another substance, the solvent.
Space Race
The Space Race (Космическая гонка) was a 20th-century competition between two Cold War rivals, the United States and the Soviet Union, to achieve superior spaceflight capability.
Space vehicle
A space vehicle is the combination of a spacecraft and its launch vehicle which carries it into space.
Specific heat capacity
In thermodynamics, the specific heat capacity (symbol) of a substance is the amount of heat that must be added to one unit of mass of the substance in order to cause an increase of one unit in temperature.
See Helium and Specific heat capacity
Spectral band
Spectral bands are regions of a given spectrum, having a specific range of wavelengths or frequencies.
Spectral line
A spectral line is a weaker or stronger region in an otherwise uniform and continuous spectrum.
Speed of sound
The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elastic medium.
Spring (hydrology)
A spring is a natural exit point at which groundwater emerges from the aquifer and flows onto the top of the Earth's crust (pedosphere) to become surface water.
See Helium and Spring (hydrology)
Stable nuclide
Stable nuclides are nuclides that are not radioactive and so (unlike radionuclides) do not spontaneously undergo radioactive decay.
Standard cubic foot
A standard cubic foot (scf) is a unit representing the amount of gas (such as natural gas) contained in a volume of one cubic foot at reference temperature and pressure conditions.
See Helium and Standard cubic foot
Star
A star is a luminous spheroid of plasma held together by self-gravity.
See Helium and Star
Stardust Planet
Stardust Planet (stylized as STARDUST PLANET) (formerly known as 3B junior) is a department of the third section of the Japanese entertainment company Stardust Promotion specialising in idols.
See Helium and Stardust Planet
Stellar nucleosynthesis
In astrophysics, stellar nucleosynthesis is the creation of chemical elements by nuclear fusion reactions within stars.
See Helium and Stellar nucleosynthesis
Sublimation (phase transition)
Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state.
See Helium and Sublimation (phase transition)
Sulfur hexafluoride
Sulfur hexafluoride or sulphur hexafluoride (British spelling) is an inorganic compound with the formula SF6.
See Helium and Sulfur hexafluoride
Sulfuric acid
Sulfuric acid (American spelling and the preferred IUPAC name) or sulphuric acid (Commonwealth spelling), known in antiquity as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen, and hydrogen, with the molecular formula. Helium and Sulfuric acid are e-number additives.
Sun
The Sun is the star at the center of the Solar System.
See Helium and Sun
Superconducting magnet
A superconducting magnet is an electromagnet made from coils of superconducting wire.
See Helium and Superconducting magnet
Superconductivity
Superconductivity is a set of physical properties observed in certain materials where electrical resistance vanishes and magnetic fields are expelled from the material. Helium and Superconductivity are quantum phases.
See Helium and Superconductivity
Superfluidity
Superfluidity is the characteristic property of a fluid with zero viscosity which therefore flows without any loss of kinetic energy. Helium and Superfluidity are quantum phases.
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.
See Helium and Supersonic wind tunnel
Telescope
A telescope is a device used to observe distant objects by their emission, absorption, or reflection of electromagnetic radiation.
Temperature
Temperature is a physical quantity that quantitatively expresses the attribute of hotness or coldness.
Tethered balloon
A tethered, moored or captive balloon is a balloon that is restrained by one or more tethers attached to the ground so it cannot float freely.
See Helium and Tethered balloon
Texas
Texas (Texas or Tejas) is the most populous state in the South Central region of the United States.
See Helium and Texas
The Astrophysical Journal
The Astrophysical Journal (ApJ) is a peer-reviewed scientific journal of astrophysics and astronomy, established in 1895 by American astronomers George Ellery Hale and James Edward Keeler.
See Helium and The Astrophysical Journal
Thermal conductivity and resistivity
The thermal conductivity of a material is a measure of its ability to conduct heat.
See Helium and Thermal conductivity and resistivity
Thermal diffusivity
In heat transfer analysis, thermal diffusivity is the thermal conductivity divided by density and specific heat capacity at constant pressure.
See Helium and Thermal diffusivity
Thermal energy
The term "thermal energy" is used loosely in various contexts in physics and engineering, generally related to the kinetic energy of vibrating and colliding atoms in a substance.
Thermal expansion
Thermal expansion is the tendency of matter to increase in length, area, or volume, changing its size and density, in response to an increase in temperature (usually excluding phase transitions).
See Helium and Thermal expansion
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 (this requires work, which is provided by the loudspeaker) or use a heat difference to produce work in the form of sound waves (these waves can then be converted into electrical current the same way as a microphone does).
See Helium and Thermoacoustic heat engine
Thomas Royds
Thomas Royds (April 11, 1884 – May 1, 1955) was a British 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, India.
Thorium
Thorium is a chemical element. Helium and Thorium are chemical elements.
Three-body problem
In physics, specifically classical mechanics, the three-body problem involves taking the initial positions and velocities (or momenta) of three point masses that orbit each other in space and calculating their subsequent trajectories using Newton's laws of motion and Newton's law of universal gravitation.
See Helium and Three-body problem
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.
Time (magazine)
Time (stylized in all caps as TIME) is an American news magazine based in New York City.
See Helium and Time (magazine)
Titanium
Titanium is a chemical element; it has symbol Ti and atomic number 22. Helium and Titanium are chemical elements.
Tonne
The tonne (or; symbol: t) is a unit of mass equal to 1,000 kilograms.
See Helium and Tonne
Tracer-gas leak testing
A tracer-gas leak testing method is a nondestructive testing method that detects gas leaks.
See Helium and Tracer-gas leak testing
Trimix (breathing gas)
Trimix is a breathing gas consisting of oxygen, helium and nitrogen and is used in deep commercial diving, during the deep phase of dives carried out using technical diving techniques, and in advanced recreational diving.
See Helium and Trimix (breathing gas)
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.
See Helium and Triple-alpha process
Tritium
Tritium or hydrogen-3 (symbol T or H) is a rare and radioactive isotope of hydrogen with half-life ~12.3 years.
Turbulence
In fluid dynamics, turbulence or turbulent flow is fluid motion characterized by chaotic changes in pressure and flow velocity.
TV Asahi
commonly abbreviated as, with the call sign JOEX-DTV (channel 5), is a Japanese television station subsidiary of certified broadcasting holding company itself controlled by The Asahi Shimbun Company serving as the flagship station of the All-Nippon News Network.
Ullage
Ullage or headspace is the unfilled space in a container, particularly with a liquid.
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.
See Helium and United States Bureau of Mines
United States Congress
The United States Congress, or simply Congress, is the legislature of the federal government of the United States.
See Helium and United States Congress
United States Department of the Interior
The United States Department of the Interior (DOI) is an executive department of the U.S. federal government responsible for the management and conservation of most federal lands and natural resources.
See Helium and United States Department of the Interior
United States Senate
The United States Senate is the upper chamber of the United States Congress.
See Helium and United States Senate
Universe
The universe is all of space and time and their contents.
University of Alberta
The University of Alberta (also known as U of A or UAlberta) is a public research university located in Edmonton, Alberta, Canada.
See Helium and University of Alberta
University of Kansas
The University of Kansas (KU) is a public and research university with its main campus in Lawrence, Kansas, United States.
See Helium and University of Kansas
Uppsala
Uppsala (archaically spelled Upsala) is the county seat of Uppsala County and the fourth-largest city in Sweden, after Stockholm, Gothenburg, and Malmö.
Uraninite
Uraninite, also known as pitchblende, is a radioactive, uranium-rich mineral and ore with a chemical composition that is largely UO2 but because of oxidation typically contains variable proportions of U3O8.
Uranium
Uranium is a chemical element; it has symbol U and atomic number 92. Helium and Uranium are chemical elements.
USS Shenandoah (ZR-1)
USS Shenandoah was the first of four United States Navy rigid airships.
See Helium and USS Shenandoah (ZR-1)
Vacuum flask
A vacuum flask (also known as a Dewar flask, Dewar bottle or thermos) is an insulating storage vessel that slows the speed at which its contents change in temperature.
Valence (chemistry)
In chemistry, the valence (US spelling) or valency (British spelling) of an atom is a measure of its combining capacity with other atoms when it forms chemical compounds or molecules.
See Helium and Valence (chemistry)
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.
See Helium and Valence and conduction bands
Van der Waals force
In molecular physics and chemistry, the van der Waals force (sometimes van de Waals' force) is a distance-dependent interaction between atoms or molecules.
See Helium and Van der Waals force
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.
See Helium and Van der Waals molecule
Vice Media
Vice Media Group LLC is a Canadian-American digital media and broadcasting company.
Viscosity
The viscosity of a fluid is a measure of its resistance to deformation at a given rate.
Vocal tract
The vocal tract is the cavity in human bodies and in animals where the sound produced at the sound source (larynx in mammals; syrinx in birds) is filtered.
Voltage
Voltage, also known as (electrical) potential difference, electric pressure, or electric tension is the difference in electric potential between two points.
Wafer (electronics)
In electronics, a wafer (also called a slice or substrate) is a thin slice of semiconductor, such as a crystalline silicon (c-Si, silicium), used for the fabrication of integrated circuits and, in photovoltaics, to manufacture solar cells.
See Helium and Wafer (electronics)
Wave equation
The wave equation is a second-order linear partial differential equation for the description of waves or standing wave fields such as mechanical waves (e.g. water waves, sound waves and seismic waves) or electromagnetic waves (including light waves).
Wavelength
In physics and mathematics, wavelength or spatial period of a wave or periodic function is the distance over which the wave's shape repeats.
Welding
Welding is a fabrication process that joins materials, usually metals or thermoplastics, primarily by using high temperature to melt the parts together and allow them to cool, causing fusion.
Willem Hendrik Keesom
He also developed the first mathematical description of dipole–dipole interactions in 1921.
See Helium and Willem Hendrik Keesom
William Crookes
Sir William Crookes (17 June 1832 – 4 April 1919) was a British chemist and physicist who attended the Royal College of Chemistry, now part of Imperial College London, and worked on spectroscopy.
See Helium and William Crookes
William Francis Hillebrand
William Francis Hillebrand (December 12, 1853 – February 7, 1925) was an American chemist.
See Helium and William Francis Hillebrand
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. Helium and William Ramsay are noble gases.
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 ionised helium and highly ionised nitrogen or carbon.
See Helium and Wolf–Rayet star
Wyoming
Wyoming is a landlocked state in the Mountain West subregion of the Western United States.
Xenon
Xenon is a chemical element; it has symbol Xe and atomic number 54. Helium and Xenon are chemical elements and noble gases.
See Helium and Xenon
Zeppelin
A Zeppelin is a type of rigid airship named after the German inventor Ferdinand von Zeppelin who pioneered rigid airship development at the beginning of the 20th century.
Zero-point energy
Zero-point energy (ZPE) is the lowest possible energy that a quantum mechanical system may have. Helium and Zero-point energy are quantum phases.
See Helium and Zero-point energy
Zeta Puppis
Zeta Puppis (ζ Puppis, abbreviated Zeta Pup, ζ Pup), formally named Naos, is the brightest star in the constellation of Puppis.
Zirconium
Zirconium is a chemical element; it has symbol Zr and atomic number 40. Helium and Zirconium are chemical elements.
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.
See also
Airship technology
- Airship hangar
- Aluminium
- Aramid
- Ballonet
- Balloon (aeronautics)
- Blau gas
- Buoyancy compensator (aviation)
- Cardington Airfield
- Geodetic airframe
- Goldbeater's skin
- Helium
- Hot air balloon
- Hydrogen
- Lamination
- Lifting gas
- Monocoque
- Mooring mast
- Polyester
- Polyvinyl fluoride
- Spy basket
- Thrust vectoring
- Truss
- Vacuum airship
Coolants
- Antifreeze
- Brine
- Carbon dioxide
- Coolant
- Cutting fluid
- Dry ice
- FC-75
- Field's metal
- Fluorinert
- Freeze spray
- Fusible alloy
- Gallium
- Helium
- Hydrofluoroether
- Kerosene
- Liquid air
- Liquid dielectrics
- Liquid helium
- Liquid hydrogen
- Liquid nitrogen
- Mercury (element)
- Mineral oil
- Neon
- Nitrogen
- Perfluoro(2-methyl-3-pentanone)
- Perfluoro-1,3-dimethylcyclohexane
- Perfluorocyclohexane
- Perfluorodecalin
- Perfluorohexane
- Perfluoromethylcyclohexane
- Perfluoromethyldecalin
- Perfluorooctane
- Perfluorotoluene
- Perfluorotributylamine
- Perfluorotripentylamine
- Polyethylene glycol
- Purified water
- Refrigerants
- Slush hydrogen
- Sodium
- Sodium–potassium alloy
- Waterless coolant
Helios
- *Seh₂ul and *Meh₁not
- Andromède
- Athena Parthenos
- Augustaion
- Colossus of Rhodes
- Halieia
- Har Senaim
- Helios
- Helium
- Medea (play)
- Phaethon (play)
- Pyanopsia
- Quadriga
- Radiate crown
- Skira
- Sol (Roman mythology)
- Sunday
- Talos
- Thargelia
- The Colossus of Rhodes (Dalí)
- The Horses of Helios
- The North Wind and the Sun
- Titans in popular culture
- Warrior relief of Efrenk
Noble gases
- Argon
- Chemically inert
- Helium
- Inert gas
- Krypton
- Liquid helium
- List of alternative nonmetal classes
- Neon
- Noble gas
- Noble gas compounds
- Oganesson
- Penning mixture
- Radon
- William Ramsay
- Xenon
Nuclear reactor coolants
- Carbon dioxide
- FLiBe
- FLiNaK
- Heavy water
- Helium
- Lead
- Lead-bismuth eutectic
- Mercury (element)
- Nuclear reactor coolant
- Sodium
- Sodium–potassium alloy
- Water
Quantum phases
- Amorphous magnet
- Antiferromagnetism
- Berry connection and curvature
- Charge-transfer insulators
- Composite fermion
- Cooper pair
- Dislon
- Fermionic condensate
- Ferrimagnetism
- Ferromagnetism
- Fractional Chern insulator
- Fractional quantum Hall effect
- Geometric phase
- Graphene
- Helium
- High-temperature superconductors
- Laughlin wavefunction
- Macroscopic quantum phenomena
- Mictomagnetism
- Mott insulator
- Paramagnetism
- Pseudogap
- Quantum Hall effect
- Quantum critical point
- Quantum fluid
- Quantum phase transition
- Quantum phases
- Quasiparticle
- Spontaneous symmetry breaking
- String-net liquid
- Superconductivity
- Superconductor–insulator transition
- Superfluidity
- Superstripes
- Symmetry-protected topological order
- Topological degeneracy
- Topological order
- Toric code
- Wrinklon
- Zero-point energy
Underwater diving equipment
- Bolt snap
- Breathing gases
- Cleaning and disinfection of personal diving equipment
- Dive light
- Diving equipment
- Diving support equipment
- Downline (diving)
- Helium
- Human factors in diving equipment design
- Liquid breathing
- Magnesium torch
- Snorkel (swimming)
- Sub Marine Explorer
- Surface-supplied diving equipment
- Towboard
- Umbilical cable
- Underwater breathing apparatus
- Vintage scuba
References
Also known as 2He, ATC code V03AN03, ATCvet code QV03AN03, Applications of helium, Atomic number 2, Balloon grade helium, Cleveite gas, E939, Element 2, He (element), Helium II, Helium applications, Helium gas, Helium shortage, Helium speech, Helium uses, Helium voice, History of helium, Inhaling Helium, Properties of helium, Solid Helium, Superfluid helium, Two fluid model for helium, Uses of helium.
, Bohr model, Boiling point, Bolling Air Force Base, Boron, Bose–Einstein condensate, Boson, Brønsted–Lowry acid–base theory, Bulk modulus, Bushton, Kansas, C-class blimp, Cambridge University Press, Carbon tetrafluoride, Carnotite, CERN, Chemical compound, Chemical element, Chemical symbol, Chemically inert, Chemistry World, China, Chromosphere, Classical physics, Clathrate compound, Cleveite, CNO cycle, Cold War, Coma, Combustibility and flammability, Compressibility, Computational chemistry, Cooper pair, Copper, Cosmic dust, Cosmology, Cryocooler, Cryogenics, Crystal, Cubic crystal system, Cyanosis, David Lee (physicist), Deep diving, Density, Deuterium, Dexter, Kansas, Diamond anvil cell, Diffusion, Dilution refrigerator, Discovery of chemical elements, Disodium helide, Douglas Osheroff, Eagle Point, Oregon, East African Rift, Edward Charles Pickering, Edward Frankland, Effective nuclear charge, Electride, Elsevier, Emission spectrum, Endohedral fullerene, Energy level, Erasmus Haworth, Ernest Rutherford, Evaporative cooler, Excimer, Federal government of the United States, Fermion, Fire retardant, Fluorite, Four Corners, Fractional distillation, Fraunhofer lines, Frostbite, Fullerene, Fundamental frequency, Fusion rocket, Gallon, 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 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, Heterosphere, High-pressure nervous syndrome, Hindenburg disaster, 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, Kainosymmetry, Kansas, Lambda point, Laminar flow, Large Hadron Collider, Laser diode, Laser pointer, Leak, Leak detection, Leidenfrost effect, Lens, Lifting gas, Liquefaction of gases, Liquid helium, Liquid nitrogen, Lithium, Lithium helide, Lithosphere, Luigi Palmieri, Macroscopic quantum phenomena, Magnetic resonance imaging, Magnetosphere, Manhattan Project, Mantle (geology), Mass number, Matter, Max Planck Institute for Gravitational Physics, Melting point, MEMS, Meteoric iron, Methane, Monatomic gas, Monazite, Monazite-(Ce), Monthly Notices of the Royal Astronomical Society, Moon, Mount Vesuvius, N. R. Pogson, Nanometre, NASA, National Helium Reserve, National Weather Service, Natural gas, Nature (journal), Naval Aircraft Factory, Neon, Niels Bohr, Ningxia, Nitrogen, Nitrogen narcosis, Noble gas, Norman Lockyer, Nuclear astrophysics, Nuclear binding energy, Nuclear drip line, Nuclear fusion, Nuclear magnetic resonance, Nuclear magnetic resonance spectroscopy, Nuclear reaction, Nuclear reactor, Nuclear shell model, Nucleon, Nucleosynthesis, Octafluorocyclobutane, Ogg, Oklahoma, Oxygen, Particle statistics, Parts-per notation, Pascal (unit), Per Teodor Cleve, Periodic table, Periodic Videos, Petroleum reservoir, Philosophical Magazine, Physics Today, Pickering series, Pierre Janssen, Pitch (music), Plasma (physics), Polystyrene, Prandtl number, Proceedings of the Royal Society, Proton–proton chain, Pyotr Kapitsa, Qatar, Qatar diplomatic crisis, QatarEnergy LNG, Quantum mechanics, Radioactive decay, Radiogenic nuclide, Rare-earth element, Ras Laffan Industrial City, 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 thermal collector, Solar wind, Solubility, Space Race, Space vehicle, Specific heat capacity, Spectral band, Spectral line, Speed of sound, Spring (hydrology), Stable nuclide, Standard cubic foot, Star, Stardust Planet, Stellar nucleosynthesis, Sublimation (phase transition), Sulfur hexafluoride, Sulfuric acid, Sun, Superconducting magnet, Superconductivity, Superfluidity, Supersonic wind tunnel, Telescope, Temperature, Tethered balloon, Texas, The Astrophysical Journal, Thermal conductivity and resistivity, Thermal diffusivity, Thermal energy, Thermal expansion, Thermoacoustic heat engine, Thomas Royds, Thorium, Three-body problem, Timbre, Time (magazine), 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 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, Vice Media, 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.