Table of Contents
267 relations: Activation energy, Adenosine diphosphate, Adenosine triphosphate, Adiabatic process, Advection, Albert Einstein, Antimatter, Aristotle, Arrhenius equation, Atmosphere, Atomic nucleus, Émilie du Châtelet, Basal metabolic rate, Big Bang, Binding energy, Biological carbon fixation, Biosphere, British thermal unit, Caloric theory, Calorie, Carbohydrate, Carbon dioxide, Carnot's theorem (thermodynamics), Casimir effect, Catabolism, Cell (biology), Centimetre–gram–second system of units, Chemical energy, Chemical potential, Chemical reaction, Classical field theory, Classical mechanics, Classical physics, Climate, Closed system, Combustion, Conjugate variables, Conservation law, Conservation of energy, Conservative force, Conserved quantity, Continental drift, Coulomb's law, Crystal, Degrees of freedom (physics and chemistry), Distribution (mathematics), Earth's energy budget, Earthquake, Ecological niche, Ecology, ... Expand index (217 more) »
- Main topic articles
- Nature
- Scalar physical quantities
- Universe
Activation energy
In the Arrhenius model of reaction rates, activation energy is the minimum amount of energy that must be available to reactants for a chemical reaction to occur.
See Energy and Activation energy
Adenosine diphosphate
Adenosine diphosphate (ADP), also known as adenosine pyrophosphate (APP), is an important organic compound in metabolism and is essential to the flow of energy in living cells.
See Energy and Adenosine diphosphate
Adenosine triphosphate
Adenosine triphosphate (ATP) is a nucleotide that provides energy to drive and support many processes in living cells, such as muscle contraction, nerve impulse propagation, and chemical synthesis.
See Energy and Adenosine triphosphate
Adiabatic process
An adiabatic process (adiabatic) is a type of thermodynamic process that occurs without transferring heat or mass between the thermodynamic system and its environment.
See Energy and Adiabatic process
Advection
In the field of physics, engineering, and earth sciences, advection is the transport of a substance or quantity by bulk motion of a fluid.
Albert Einstein
Albert Einstein (14 March 1879 – 18 April 1955) was a German-born theoretical physicist who is widely held as one of the most influential scientists. Best known for developing the theory of relativity, Einstein also made important contributions to quantum mechanics. His mass–energy equivalence formula, which arises from relativity theory, has been called "the world's most famous equation".
See Energy and Albert Einstein
Antimatter
In modern physics, antimatter is defined as matter composed of the antiparticles (or "partners") of the corresponding particles in "ordinary" matter, and can be thought of as matter with reversed charge, parity, and time, known as CPT reversal.
Aristotle
Aristotle (Ἀριστοτέλης Aristotélēs; 384–322 BC) was an Ancient Greek philosopher and polymath.
Arrhenius equation
In physical chemistry, the Arrhenius equation is a formula for the temperature dependence of reaction rates.
See Energy and Arrhenius equation
Atmosphere
An atmosphere is a layer of gasses that envelop an astronomical object, held in place by the gravity of the object.
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.
Émilie du Châtelet
Gabrielle Émilie Le Tonnelier de Breteuil, Marquise du Châtelet (17 December 1706 – 10 September 1749) was a French natural philosopher and mathematician from the early 1730s until her death due to complications during childbirth in 1749.
See Energy and Émilie du Châtelet
Basal metabolic rate
Basal metabolic rate (BMR) is the rate of energy expenditure per unit time by endothermic animals at rest.
See Energy and Basal metabolic rate
Big Bang
The Big Bang is a physical theory that describes how the universe expanded from an initial state of high density and temperature.
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.
Biological carbon fixation
Biological carbon fixation, or сarbon assimilation, is the process by which living organisms convert inorganic carbon (particularly carbon dioxide) to organic compounds.
See Energy and Biological carbon fixation
Biosphere
The biosphere, also called the ecosphere, is the worldwide sum of all ecosystems.
British thermal unit
The British thermal unit (Btu) is a measure of heat, which is a form of energy.
See Energy and British thermal unit
Caloric theory
The caloric theory is an obsolete scientific theory that heat consists of a self-repellent fluid called caloric that flows from hotter bodies to colder bodies.
Calorie
The calorie is a unit of energy that originated from the caloric theory of heat.
Carbohydrate
A carbohydrate is a biomolecule consisting of carbon (C), hydrogen (H) and oxygen (O) atoms, usually with a hydrogen–oxygen atom ratio of 2:1 (as in water) and thus with the empirical formula (where m may or may not be different from n), which does not mean the H has covalent bonds with O (for example with, H has a covalent bond with C but not with O).
Carbon dioxide
Carbon dioxide is a chemical compound with the chemical formula.
Carnot's theorem (thermodynamics)
Carnot's theorem, also called Carnot's rule, is a principle of thermodynamics developed by Nicolas Léonard Sadi Carnot in 1824 that specifies limits on the maximum efficiency that any heat engine can obtain.
See Energy and Carnot's theorem (thermodynamics)
Casimir effect
In quantum field theory, the Casimir effect (or Casimir force) is a physical force acting on the macroscopic boundaries of a confined space which arises from the quantum fluctuations of a field.
Catabolism
Catabolism is the set of metabolic pathways that breaks down molecules into smaller units that are either oxidized to release energy or used in other anabolic reactions.
Cell (biology)
The cell is the basic structural and functional unit of all forms of life.
Centimetre–gram–second system of units
The centimetre–gram–second system of units (CGS or cgs) is a variant of the metric system based on the centimetre as the unit of length, the gram as the unit of mass, and the second as the unit of time.
See Energy and Centimetre–gram–second system of units
Chemical energy
Chemical energy is the energy of chemical substances that is released when the substances undergo a chemical reaction and transform into other substances.
See Energy and Chemical energy
Chemical potential
In thermodynamics, the chemical potential of a species is the energy that can be absorbed or released due to a change of the particle number of the given species, e.g. in a chemical reaction or phase transition.
See Energy and Chemical potential
Chemical reaction
A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another.
See Energy and Chemical reaction
Classical field theory
A classical field theory is a physical theory that predicts how one or more fields in physics interact with matter through field equations, without considering effects of quantization; theories that incorporate quantum mechanics are called quantum field theories.
See Energy and Classical field theory
Classical mechanics
Classical mechanics is a physical theory describing the motion of objects such as projectiles, parts of machinery, spacecraft, planets, stars, and galaxies.
See Energy and Classical mechanics
Classical physics
Classical physics is a group of physics theories that predate modern, more complete, or more widely applicable theories.
See Energy and Classical physics
Climate
Climate is the long-term weather pattern in a region, typically averaged over 30 years.
Closed system
A closed system is a natural physical system that does not allow transfer of matter in or out of the system, althoughin the contexts of physics, chemistry, engineering, etc.
Combustion
Combustion, or burning, is a high-temperature exothermic redox chemical reaction between a fuel (the reductant) and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke.
Conjugate variables
Conjugate variables are pairs of variables mathematically defined in such a way that they become Fourier transform duals, or more generally are related through Pontryagin duality.
See Energy and Conjugate variables
Conservation law
In physics, a conservation law states that a particular measurable property of an isolated physical system does not change as the system evolves over time.
See Energy and Conservation law
Conservation of energy
The law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be ''conserved'' over time.
See Energy and Conservation of energy
Conservative force
In physics, a conservative force is a force with the property that the total work done by the force in moving a particle between two points is independent of the path taken.
See Energy and Conservative force
Conserved quantity
A conserved quantity is a property or value that remains constant over time in a system even when changes occur in the system.
See Energy and Conserved quantity
Continental drift
Continental drift is the hypothesis, originating in the early 20th century, that Earth's continents move or drift relative to each other over geologic time.
See Energy and Continental drift
Coulomb's law
Coulomb's inverse-square law, or simply Coulomb's law, is an experimental law of physics that calculates the amount of force between two electrically charged particles at rest.
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.
Degrees of freedom (physics and chemistry)
In physics and chemistry, a degree of freedom is an independent physical parameter in the formal description of the state of a physical system.
See Energy and Degrees of freedom (physics and chemistry)
Distribution (mathematics)
Distributions, also known as Schwartz distributions or generalized functions, are objects that generalize the classical notion of functions in mathematical analysis.
See Energy and Distribution (mathematics)
Earth's energy budget
Earth's energy budget (or Earth's energy balance) accounts for the balance between the energy that Earth receives from the Sun and the energy the Earth loses back into outer space.
See Energy and Earth's energy budget
Earthquake
An earthquakealso called a quake, tremor, or tembloris the shaking of the Earth's surface resulting from a sudden release of energy in the lithosphere that creates seismic waves.
Ecological niche
In ecology, a niche is the match of a species to a specific environmental condition.
See Energy and Ecological niche
Ecology
Ecology is the natural science of the relationships among living organisms, including humans, and their physical environment.
Ecosystem
An ecosystem (or ecological system) is a system that environments and their organisms form through their interaction.
Efficient energy use
Efficient energy use, or energy efficiency, is the process of reducing the amount of energy required to provide products and services.
See Energy and Efficient energy use
Elastic energy
Elastic energy is the mechanical potential energy stored in the configuration of a material or physical system as it is subjected to elastic deformation by work performed upon it.
Electric battery
An electric battery is a source of electric power consisting of one or more electrochemical cells with external connections for powering electrical devices.
See Energy and Electric battery
Electric charge
Electric charge (symbol q, sometimes Q) is the physical property of matter that causes it to experience a force when placed in an electromagnetic field.
See Energy and Electric charge
Electric generator
In electricity generation, a generator is a device that converts motion-based power (potential and kinetic energy) or fuel-based power (chemical energy) into electric power for use in an external circuit.
See Energy and Electric generator
Electrical energy
Electrical energy is energy related to forces on electrically charged particles and the movement of those particles (often electrons in wires, but not always).
See Energy and Electrical energy
Electromagnetic radiation
In physics, electromagnetic radiation (EMR) consists of waves of the electromagnetic (EM) field, which propagate through space and carry momentum and electromagnetic radiant energy.
See Energy and Electromagnetic radiation
Electromagnetism
In physics, electromagnetism is an interaction that occurs between particles with electric charge via electromagnetic fields.
See Energy and Electromagnetism
Electron
The electron (or in nuclear reactions) is a subatomic particle with a negative one elementary electric charge.
Electronvolt
In physics, an electronvolt (symbol eV), also written electron-volt and electron volt, is the measure of an amount of kinetic energy gained by a single electron accelerating through an electric potential difference of one volt in vacuum.
Endothermic process
An endothermic process is a chemical or physical process that absorbs heat from its surroundings.
See Energy and Endothermic process
Energy
Energy is the quantitative property that is transferred to a body or to a physical system, recognizable in the performance of work and in the form of heat and light. Energy and Energy are main topic articles, nature, scalar physical quantities and universe.
Energy conservation
Energy conservation is the effort to reduce wasteful energy consumption by using fewer energy services.
See Energy and Energy conservation
Energy conversion efficiency
Energy conversion efficiency (η) is the ratio between the useful output of an energy conversion machine and the input, in energy terms.
See Energy and Energy conversion efficiency
Energy crisis
An energy crisis or energy shortage is any significant bottleneck in the supply of energy resources to an economy.
Energy democracy
Energy democracy is a concept developed within the environmental justice movement that pairs the renewable energy transition with efforts to democratize the production and management of energy resources— including the social ownership of energy infrastructure, decentralization of energy systems, and expansion of public participation in energy-related policymaking.
See Energy and Energy democracy
Energy development
Energy development is the field of activities focused on obtaining sources of energy from natural resources.
See Energy and Energy development
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.
Energy recovery
Energy recovery includes any technique or method of minimizing the input of energy to an overall system by the exchange of energy from one sub-system of the overall system with another.
See Energy and Energy recovery
Energy recycling
Energy recycling is the energy recovery process of using energy that would normally be wasted, usually by converting it into electricity or thermal energy.
See Energy and Energy recycling
Energy storage
Energy storage is the capture of energy produced at one time for use at a later time to reduce imbalances between energy demand and energy production.
Energy transformation
Energy transformation, also known as energy conversion, is the process of changing energy from one form to another.
See Energy and Energy transformation
Entropy
Entropy is a scientific concept that is most commonly associated with a state of disorder, randomness, or uncertainty.
Environmental degradation
Environmental degradation is the deterioration of the environment through depletion of resources such as quality of air, water and soil; the destruction of ecosystems; habitat destruction; the extinction of wildlife; and pollution.
See Energy and Environmental degradation
Enzyme
Enzymes are proteins that act as biological catalysts by accelerating chemical reactions.
Equipartition theorem
In classical statistical mechanics, the equipartition theorem relates the temperature of a system to its average energies.
See Energy and Equipartition theorem
Erg
The erg is a unit of energy equal to 10−7joules (100nJ).
See Energy and Erg
Exergonic process
An exergonic process is one which there is a positive flow of energy from the system to the surroundings.
See Energy and Exergonic process
Exergy
Exergy, often referred to as "available energy" or "useful work potential", is a fundamental concept in the field of thermodynamics and engineering.
Exothermic process
In thermodynamics, an exothermic process is a thermodynamic process or reaction that releases energy from the system to its surroundings, usually in the form of heat, but also in a form of light (e.g. a spark, flame, or flash), electricity (e.g. a battery), or sound (e.g. explosion heard when burning hydrogen).
See Energy and Exothermic process
Explosive
An explosive (or explosive material) is a reactive substance that contains a great amount of potential energy that can produce an explosion if released suddenly, usually accompanied by the production of light, heat, sound, and pressure.
Field (physics)
In science, a field is a physical quantity, represented by a scalar, vector, or tensor, that has a value for each point in space and time.
See Energy and Field (physics)
First law of thermodynamics
The first law of thermodynamics is a formulation of the law of conservation of energy in the context of thermodynamic processes.
See Energy and First law of thermodynamics
Food chain
A food chain is a linear network of links in a food web, often starting with an autotroph (such as grass or algae), also called a producer, and typically ending at an apex predator (such as grizzly bears or killer whales), detritivore (such as earthworms and woodlice), or decomposer (such as fungi or bacteria).
Foot-pound (energy)
The foot-pound force (symbol: ft⋅lbf, ft⋅lbf, or ft⋅lb) is a unit of work or energy in the engineering and gravitational systems in United States customary and imperial units of measure.
See Energy and Foot-pound (energy)
Force
A force is an influence that can cause an object to change its velocity, i.e., to accelerate, meaning a change in speed or direction, unless counterbalanced by other forces.
See Energy and Force
Fossil fuel
A fossil fuel is a carbon compound- or hydrocarbon-containing material such as coal, oil, and natural gas, formed naturally in the Earth's crust from the remains of prehistoric organisms (animals, plants and planktons), a process that occurs within geological formations.
Four-momentum
In special relativity, four-momentum (also called momentum–energy or momenergy) is the generalization of the classical three-dimensional momentum to four-dimensional spacetime.
Frame of reference
In physics and astronomy, a frame of reference (or reference frame) is an abstract coordinate system whose origin, orientation, and scale are specified by a set of reference points―geometric points whose position is identified both mathematically (with numerical coordinate values) and physically (signaled by conventional markers).
See Energy and Frame of reference
Frequency
Frequency (symbol f), most often measured in hertz (symbol: Hz), is the number of occurrences of a repeating event per unit of time. Energy and Frequency are scalar physical quantities.
Friction
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.
Friedrich Hasenöhrl
Friedrich Hasenöhrl (30 November 1874 – 7 October 1915) was an Austrian physicist.
See Energy and Friedrich Hasenöhrl
Fundamental interaction
In physics, the fundamental interactions or fundamental forces are the interactions that do not appear to be reducible to more basic interactions.
See Energy and Fundamental interaction
Gamma-ray burst
In gamma-ray astronomy, gamma-ray bursts (GRBs) are immensely energetic explosions that have been observed in distant galaxies, being the brightest and most extreme explosive events in the entire universe, as NASA describes the bursts as the "most powerful class of explosions in the universe".
See Energy and Gamma-ray burst
Gaspard-Gustave de Coriolis
Gaspard-Gustave de Coriolis (21 May 1792 – 19 September 1843) was a French mathematician, mechanical engineer and scientist.
See Energy and Gaspard-Gustave de Coriolis
Geothermal energy
Geothermal energy is thermal energy extracted from the Earth's crust.
See Energy and Geothermal energy
Glucose
Glucose is a sugar with the molecular formula.
Gottfried Wilhelm Leibniz
Gottfried Wilhelm Leibniz (– 14 November 1716) was a German polymath active as a mathematician, philosopher, scientist and diplomat who invented calculus in addition to many other branches of mathematics, such as binary arithmetic, and statistics.
See Energy and Gottfried Wilhelm Leibniz
Gravitational collapse
Gravitational collapse is the contraction of an astronomical object due to the influence of its own gravity, which tends to draw matter inward toward the center of gravity.
See Energy and Gravitational collapse
Gravitational energy
Gravitational energy or gravitational potential energy is the potential energy a massive object has due to its position in a gravitational field.
See Energy and Gravitational energy
Hadron
In particle physics, a hadron is a composite subatomic particle made of two or more quarks held together by the strong interaction.
Hail
Hail is a form of solid precipitation.
See Energy and Hail
Hamiltonian (quantum mechanics)
In quantum mechanics, the Hamiltonian of a system is an operator corresponding to the total energy of that system, including both kinetic energy and potential energy.
See Energy and Hamiltonian (quantum mechanics)
Hamiltonian mechanics
In physics, Hamiltonian mechanics is a reformulation of Lagrangian mechanics that emerged in 1833.
See Energy and Hamiltonian mechanics
Harmonic oscillator
In classical mechanics, a harmonic oscillator is a system that, when displaced from its equilibrium position, experiences a restoring force F proportional to the displacement x: \vec F.
See Energy and Harmonic oscillator
Heat
In thermodynamics, heat is the thermal energy transferred between systems due to a temperature difference.
See Energy and Heat
Heat death of the universe
The heat death of the universe (also known as the Big Chill or Big Freeze) is a hypothesis on the ultimate fate of the universe, which suggests the universe will evolve to a state of no thermodynamic free energy, and will therefore be unable to sustain processes that increase entropy.
See Energy and Heat death of the universe
Heat engine
A heat engine is a system that converts heat to usable energy, particularly mechanical energy, which can then be used to do mechanical work.
Henri Poincaré
Jules Henri Poincaré (29 April 185417 July 1912) was a French mathematician, theoretical physicist, engineer, and philosopher of science.
Human equivalent
The term human equivalent is used in a number of different contexts.
See Energy and Human equivalent
Imperial and US customary measurement systems
The imperial and US customary measurement systems are both derived from an earlier English system of measurement which in turn can be traced back to Ancient Roman units of measurement, and Carolingian and Saxon units of measure.
See Energy and Imperial and US customary measurement systems
Index of energy articles
This is an index of energy articles.
See Energy and Index of energy articles
Index of wave articles
This is a list of wave topics.
See Energy and Index of wave articles
Internal energy
The internal energy of a thermodynamic system is the energy contained within it, measured as the quantity of energy necessary to bring the system from its standard internal state to its present internal state of interest, accounting for the gains and losses of energy due to changes in its internal state, including such quantities as magnetization.
See Energy and Internal energy
International System of Units
The International System of Units, internationally known by the abbreviation SI (from French Système international d'unités), is the modern form of the metric system and the world's most widely used system of measurement.
See Energy and International System of Units
Invariant mass
The invariant mass, rest mass, intrinsic mass, proper mass, or in the case of bound systems simply mass, is the portion of the total mass of an object or system of objects that is independent of the overall motion of the system.
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 Energy and Ionization energy
Irreversible process
In science, a process that is not reversible is called irreversible.
See Energy and Irreversible process
Isolated system
In physical science, an isolated system is either of the following.
See Energy and Isolated system
J. J. Thomson
Sir Joseph John Thomson (18 December 1856 – 30 August 1940) was a British physicist and Nobel Laureate in Physics, credited with the discovery of the electron, the first subatomic particle to be found.
James Prescott Joule
James Prescott Joule (24 December 1818 11 October 1889) was an English physicist, mathematician and brewer, born in Salford, Lancashire.
See Energy and James Prescott Joule
Josef Stefan
Josef Stefan (Jožef Štefan; 24 March 1835 – 7 January 1893) was a Carinthian Slovene physicist, mathematician, and poet of the Austrian Empire.
Joseph-Louis Lagrange
Joseph-Louis Lagrange (born Giuseppe Luigi Lagrangia, Encyclopædia Britannica or Giuseppe Ludovico De la Grange Tournier; 25 January 1736 – 10 April 1813), also reported as Giuseppe Luigi Lagrange or Lagrangia, was an Italian mathematician, physicist and astronomer, later naturalized French.
See Energy and Joseph-Louis Lagrange
Josiah Willard Gibbs
Josiah Willard Gibbs (February 11, 1839 – April 28, 1903) was an American scientist who made significant theoretical contributions to physics, chemistry, and mathematics.
See Energy and Josiah Willard Gibbs
Joule
The joule (pronounced, or; symbol: J) is the unit of energy in the International System of Units (SI).
See Energy and Joule
Kilowatt-hour
A kilowatt-hour (unit symbol: kW⋅h or kW h; commonly written as kWh) is a non-SI unit of energy equal to 3.6 megajoules (MJ) in SI units which is the energy delivered by one kilowatt of power for one hour.
Kinetic energy
In physics, the kinetic energy of an object is the form of energy that it possesses due to its motion.
Lagrangian mechanics
In physics, Lagrangian mechanics is a formulation of classical mechanics founded on the stationary-action principle (also known as the principle of least action).
See Energy and Lagrangian mechanics
Lattice energy
In chemistry, the lattice energy is the energy change upon formation of one mole of a crystalline ionic compound from its constituent ions, which are assumed to initially be in the gaseous state.
Light
Light, visible light, or visible radiation is electromagnetic radiation that can be perceived by the human eye.
See Energy and Light
Line integral
In mathematics, a line integral is an integral where the function to be integrated is evaluated along a curve.
Lipid
Lipids are a broad group of organic compounds which include fats, waxes, sterols, fat-soluble vitamins (such as vitamins A, D, E and K), monoglycerides, diglycerides, phospholipids, and others.
See Energy and Lipid
List of low-energy building techniques
Low-energy buildings, which include zero-energy buildings, passive houses and green buildings, may use any of a large number of techniques to lower energy use.
See Energy and List of low-energy building techniques
Lord Kelvin
William Thomson, 1st Baron Kelvin, (26 June 182417 December 1907) was a British mathematician, mathematical physicist and engineer born in Belfast.
Lorentz scalar
In a relativistic theory of physics, a Lorentz scalar is a scalar expression whose value is invariant under any Lorentz transformation.
Lorentz transformation
In physics, the Lorentz transformations are a six-parameter family of linear transformations from a coordinate frame in spacetime to another frame that moves at a constant velocity relative to the former.
See Energy and Lorentz transformation
Machine
A machine is a physical system that uses power to apply forces and control movement to perform an action.
Macroscopic scale
The macroscopic scale is the length scale on which objects or phenomena are large enough to be visible with the naked eye, without magnifying optical instruments.
See Energy and Macroscopic scale
Magnetic energy
The potential magnetic energy of a magnet or magnetic moment \mathbf in a magnetic field \mathbf is defined as the mechanical work of the magnetic force on the re-alignment of the vector of the magnetic dipole moment and is equal to: E_\text.
See Energy and Magnetic energy
Mass
Mass is an intrinsic property of a body. Energy and Mass are scalar physical quantities.
See Energy and Mass
Mass in special relativity
The word "mass" has two meanings in special relativity: invariant mass (also called rest mass) is an invariant quantity which is the same for all observers in all reference frames, while the relativistic mass is dependent on the velocity of the observer.
See Energy and Mass in special relativity
Mass–energy equivalence
In physics, mass–energy equivalence is the relationship between mass and energy in a system's rest frame, where the two quantities differ only by a multiplicative constant and the units of measurement.
See Energy and Mass–energy equivalence
Matter
In classical physics and general chemistry, matter is any substance that has mass and takes up space by having volume. Energy and matter are nature and universe.
Measurement
Measurement is the quantification of attributes of an object or event, which can be used to compare with other objects or events.
Mechanical energy
In physical sciences, mechanical energy is the sum of potential energy and kinetic energy.
See Energy and Mechanical energy
Mechanical wave
In physics, a mechanical wave is a wave that is an oscillation of matter, and therefore transfers energy through a material medium.
See Energy and Mechanical wave
Metabolic pathway
In biochemistry, a metabolic pathway is a linked series of chemical reactions occurring within a cell.
See Energy and Metabolic pathway
Metabolism
Metabolism (from μεταβολή metabolē, "change") is the set of life-sustaining chemical reactions in organisms.
Meteorology
Meteorology is a branch of the atmospheric sciences (which include atmospheric chemistry and physics) with a major focus on weather forecasting.
Microscopic scale
The microscopic scale is the scale of objects and events smaller than those that can easily be seen by the naked eye, requiring a lens or microscope to see them clearly.
See Energy and Microscopic scale
Mitochondrion
A mitochondrion is an organelle found in the cells of most eukaryotes, such as animals, plants and fungi.
Momentum
In Newtonian mechanics, momentum (momenta or momentums; more specifically linear momentum or translational momentum) is the product of the mass and velocity of an object.
Motion
In physics, motion is when an object changes its position with respect to a reference point in a given time.
Mountain
A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock.
National Science Teaching Association
The National Science Teaching Association (NSTA), founded in 1944 (as the National Science Teachers Association) and headquartered in Arlington, Virginia, is an association of science teachers in the United States and is the largest organization of science teachers worldwide.
See Energy and National Science Teaching Association
Newton's laws of motion
Newton's laws of motion are three physical laws that describe the relationship between the motion of an object and the forces acting on it.
See Energy and Newton's laws of motion
Noether's theorem
Noether's theorem states that every continuous symmetry of the action of a physical system with conservative forces has a corresponding conservation law.
See Energy and Noether's theorem
Nova
A nova (novae or novas) is a transient astronomical event that causes the sudden appearance of a bright, apparently "new" star (hence the name "nova", Latin for "new") that slowly fades over weeks or months.
See Energy and Nova
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 Energy and Nuclear binding energy
Nuclear force
The nuclear force (or nucleon–nucleon interaction, residual strong force, or, historically, strong nuclear force) is a force that acts between hadrons, most commonly observed between protons and neutrons of atoms.
Nuclear fuel
Nuclear fuel is material used in nuclear power stations to produce heat to power turbines.
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 physics
Nuclear physics is the field of physics that studies atomic nuclei and their constituents and interactions, in addition to the study of other forms of nuclear matter.
See Energy and Nuclear physics
Nuclear reactor
A nuclear reactor is a device used to initiate and control a fission nuclear chain reaction or nuclear fusion reactions.
See Energy and Nuclear reactor
Nuclear weapon
A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission (fission bomb) or a combination of fission and fusion reactions (thermonuclear bomb), producing a nuclear explosion.
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 Energy and Nucleosynthesis
Orders of magnitude (energy)
This list compares various energies in joules (J), organized by order of magnitude.
See Energy and Orders of magnitude (energy)
Organelle
In cell biology, an organelle is a specialized subunit, usually within a cell, that has a specific function.
Organism
An organism is defined in a medical dictionary as any living thing that functions as an individual.
Orogeny
Orogeny is a mountain-building process that takes place at a convergent plate margin when plate motion compresses the margin.
Oscillation
Oscillation is the repetitive or periodic variation, typically in time, of some measure about a central value (often a point of equilibrium) or between two or more different states.
Pair production
Pair production is the creation of a subatomic particle and its antiparticle from a neutral boson.
See Energy and Pair production
Particle physics
Particle physics or high-energy physics is the study of fundamental particles and forces that constitute matter and radiation.
See Energy and Particle physics
Pendulum
A pendulum is a device made of a weight suspended from a pivot so that it can swing freely.
Philosophiæ Naturalis Principia Mathematica
Philosophiæ Naturalis Principia Mathematica (English: The Mathematical Principles of Natural Philosophy) often referred to as simply the Principia, is a book by Isaac Newton that expounds Newton's laws of motion and his law of universal gravitation.
See Energy and Philosophiæ Naturalis Principia Mathematica
Photon
A photon is an elementary particle that is a quantum of the electromagnetic field, including electromagnetic radiation such as light and radio waves, and the force carrier for the electromagnetic force.
Photon energy
Photon energy is the energy carried by a single photon.
Photosynthesis
Photosynthesis is a system of biological processes by which photosynthetic organisms, such as most plants, algae, and cyanobacteria, convert light energy, typically from sunlight, into the chemical energy necessary to fuel their metabolism.
Physical object
In common usage and classical mechanics, a physical object or physical body (or simply an object or body) is a collection of matter within a defined contiguous boundary in three-dimensional space.
See Energy and Physical object
Physical property
A physical property is any property of a physical system that is measurable.
See Energy and Physical property
Physical quantity
A physical quantity (or simply quantity) is a property of a material or system that can be quantified by measurement.
See Energy and Physical quantity
Physical system
A physical system is a collection of physical objects under study.
See Energy and Physical system
Planck constant
The Planck constant, or Planck's constant, denoted by is a fundamental physical constant of foundational importance in quantum mechanics: a photon's energy is equal to its frequency multiplied by the Planck constant, and the wavelength of a matter wave equals the Planck constant divided by the associated particle momentum.
See Energy and Planck constant
Planck relation
The Planck relationFrench & Taylor (1978), pp.
See Energy and Planck relation
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 Energy and Plasma (physics)
Plasma globe
A plasma ball, plasma globe, or plasma lamp is a clear glass container filled with noble gases, usually a mixture of neon, krypton, and xenon, that has a high-voltage electrode in the center of the container.
Plate tectonics
Plate tectonics is the scientific theory that Earth's lithosphere comprises a number of large tectonic plates, which have been slowly moving since 3–4 billion years ago.
See Energy and Plate tectonics
Population
Population is the term typically used to refer to the number of people in a single area.
Positron
The positron or antielectron is the particle with an electric charge of +1e, a spin of 1/2 (the same as the electron), and the same mass as an electron.
Potential energy
In physics, potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors.
See Energy and Potential energy
Potentiality and actuality
In philosophy, potentiality and actuality are a pair of closely connected principles which Aristotle used to analyze motion, causality, ethics, and physiology in his Physics, Metaphysics, Nicomachean Ethics, and De Anima.
See Energy and Potentiality and actuality
Power (physics)
Power is the amount of energy transferred or converted per unit time.
See Energy and Power (physics)
Power station
A power station, also referred to as a power plant and sometimes generating station or generating plant, is an industrial facility for the generation of electric power.
Pressure
Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Energy and Pressure are scalar physical quantities.
Principle of maximum entropy
The principle of maximum entropy states that the probability distribution which best represents the current state of knowledge about a system is the one with largest entropy, in the context of precisely stated prior data (such as a proposition that expresses testable information).
See Energy and Principle of maximum entropy
Protein
Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues.
Quantum
In physics, a quantum (quanta) is the minimum amount of any physical entity (physical property) involved in an interaction.
Quantum chromodynamics binding energy
Quantum chromodynamics binding energy (QCD binding energy), gluon binding energy or chromodynamic binding energy is the energy binding quarks together into hadrons.
See Energy and Quantum chromodynamics binding energy
Quantum mechanics
Quantum mechanics is a fundamental theory that describes the behavior of nature at and below the scale of atoms.
See Energy and Quantum mechanics
Quark
A quark is a type of elementary particle and a fundamental constituent of matter.
See Energy and Quark
Quasar
A quasar is an extremely luminous active galactic nucleus (AGN).
Radiant energy
In physics, and in particular as measured by radiometry, radiant energy is the energy of electromagnetic and gravitational radiation.
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 Energy and Radioactive decay
Renewable energy
Renewable energy (or green energy) is energy from renewable natural resources that are replenished on a human timescale.
See Energy and Renewable energy
Respiration (physiology)
In physiology, respiration is the movement of oxygen from the outside environment to the cells within tissues, and the removal of carbon dioxide in the opposite direction to the surrounding environment.
See Energy and Respiration (physiology)
Reversible process (thermodynamics)
In thermodynamics, a reversible process is a process, involving a system and its surroundings, whose direction can be reversed by infinitesimal changes in some properties of the surroundings, such as pressure or temperature.
See Energy and Reversible process (thermodynamics)
Richard Feynman
Richard Phillips Feynman (May 11, 1918 – February 15, 1988) was an American theoretical physicist, known for his work in the path integral formulation of quantum mechanics, the theory of quantum electrodynamics, the physics of the superfluidity of supercooled liquid helium, as well as his work in particle physics for which he proposed the parton model.
See Energy and Richard Feynman
Rotational energy
Rotational energy or angular kinetic energy is kinetic energy due to the rotation of an object and is part of its total kinetic energy.
See Energy and Rotational energy
Rudolf Clausius
Rudolf Julius Emanuel Clausius (2 January 1822 – 24 August 1888) was a German physicist and mathematician and is considered one of the central founding fathers of the science of thermodynamics.
See Energy and Rudolf Clausius
Schrödinger equation
The Schrödinger equation is a partial differential equation that governs the wave function of a quantum-mechanical system.
See Energy and Schrödinger equation
Scientific American
Scientific American, informally abbreviated SciAm or sometimes SA, is an American popular science magazine.
See Energy and Scientific American
Second law of thermodynamics
The second law of thermodynamics is a physical law based on universal empirical observation concerning heat and energy interconversions.
See Energy and Second law of thermodynamics
SI derived unit
SI derived units are units of measurement derived from the seven SI base units specified by the International System of Units (SI).
See Energy and SI derived unit
Solar energy
Solar energy is radiant light and heat from the Sun that is harnessed using a range of technologies such as solar power to generate electricity, solar thermal energy (including solar water heating), and solar architecture.
Sound
In physics, sound is a vibration that propagates as an acoustic wave through a transmission medium such as a gas, liquid or solid.
See Energy and Sound
Sound energy
In physics, sound energy is a form of energy that can be heard by living things.
Space
Space is a three-dimensional continuum containing positions and directions. Energy and Space are nature.
See Energy and Space
Spacetime
In physics, spacetime, also called the space-time continuum, is a mathematical model that fuses the three dimensions of space and the one dimension of time into a single four-dimensional continuum.
Special relativity
In physics, the special theory of relativity, or special relativity for short, is a scientific theory of the relationship between space and time.
See Energy and Special relativity
Speed
In kinematics, the speed (commonly referred to as v) of an object is the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity.
See Energy and Speed
Speed of light
The speed of light in vacuum, commonly denoted, is a universal physical constant that is exactly equal to). According to the special theory of relativity, is the upper limit for the speed at which conventional matter or energy (and thus any signal carrying information) can travel through space.
Spontaneous fission
Spontaneous fission (SF) is a form of radioactive decay in which a heavy atomic nucleus splits into two or more lighter nuclei.
See Energy and Spontaneous fission
Star
A star is a luminous spheroid of plasma held together by self-gravity.
See Energy and Star
Statistical mechanics
In physics, statistical mechanics is a mathematical framework that applies statistical methods and probability theory to large assemblies of microscopic entities.
See Energy and Statistical mechanics
Stearin
Stearin, or tristearin, or glyceryl tristearate is an odourless, white powder.
Stress–energy tensor
The stress–energy tensor, sometimes called the stress–energy–momentum tensor or the energy–momentum tensor, is a tensor physical quantity that describes the density and flux of energy and momentum in spacetime, generalizing the stress tensor of Newtonian physics.
See Energy and Stress–energy tensor
Supernova
A supernova (supernovae or supernovas) is a powerful and luminous explosion of a star.
Sustainable energy
Energy is sustainable if it "meets the needs of the present without compromising the ability of future generations to meet their own needs." Definitions of sustainable energy usually look at its effects on the environment, the economy and society.
See Energy and Sustainable energy
System
A system is a group of interacting or interrelated elements that act according to a set of rules to form a unified whole.
Temperature
Temperature is a physical quantity that quantitatively expresses the attribute of hotness or coldness. Energy and Temperature are scalar physical quantities.
The Feynman Lectures on Physics
The Feynman Lectures on Physics is a physics textbook based on a great number of lectures by Richard Feynman, a Nobel laureate who has sometimes been called "The Great Explainer".
See Energy and The Feynman Lectures on Physics
Thermal efficiency
In thermodynamics, the thermal efficiency (\eta_) is a dimensionless performance measure of a device that uses thermal energy, such as an internal combustion engine, steam turbine, steam engine, boiler, furnace, refrigerator, ACs etc.
See Energy and Thermal efficiency
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.
Thermodynamic equilibrium
Thermodynamic equilibrium is an axiomatic concept of thermodynamics.
See Energy and Thermodynamic equilibrium
Thermodynamic free energy
In thermodynamics, the thermodynamic free energy is one of the state functions of a thermodynamic system (the others being internal energy, enthalpy, entropy, etc.). The change in the free energy is the maximum amount of work that the system can perform in a process at constant temperature, and its sign indicates whether the process is thermodynamically favorable or forbidden.
See Energy and Thermodynamic free energy
Thermodynamic process
Classical thermodynamics considers three main kinds of thermodynamic processes: (1) changes in a system, (2) cycles in a system, and (3) flow processes.
See Energy and Thermodynamic process
Thermodynamic system
A thermodynamic system is a body of matter and/or radiation separate from its surroundings that can be studied using the laws of thermodynamics.
See Energy and Thermodynamic system
Thermodynamics
Thermodynamics is a branch of physics that deals with heat, work, and temperature, and their relation to energy, entropy, and the physical properties of matter and radiation.
Thomas Young (scientist)
Thomas Young FRS (13 June 177310 May 1829) was a British polymath who made notable contributions to the fields of vision, light, solid mechanics, energy, physiology, language, musical harmony, and Egyptology.
See Energy and Thomas Young (scientist)
Thorium
Thorium is a chemical element.
Tidal force
The tidal force or tide-generating force is a gravitational effect that stretches a body along the line towards and away from the center of mass of another body due to spatial variations in strength in gravitational field from the other body.
Tornado
A tornado is a violently rotating column of air that is in contact with both the surface of the Earth and a cumulonimbus cloud or, in rare cases, the base of a cumulus cloud.
Transducer
A transducer is a device that converts energy from one form to another.
Translational symmetry
In physics and mathematics, continuous translational symmetry is the invariance of a system of equations under any translation (without rotation).
See Energy and Translational symmetry
Tropical cyclone
A tropical cyclone is a rapidly rotating storm system with a low-pressure center, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain and squalls.
See Energy and Tropical cyclone
Turbine
A turbine (from the Greek τύρβη, tyrbē, or Latin turbo, meaning vortex) is a rotary mechanical device that extracts energy from a fluid flow and converts it into useful work.
Uncertainty principle
The uncertainty principle, also known as Heisenberg's indeterminacy principle, is a fundamental concept in quantum mechanics.
See Energy and Uncertainty principle
Uranium
Uranium is a chemical element; it has symbol U and atomic number 92.
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 Energy and Van der Waals force
Virtual particle
A virtual particle is a theoretical transient particle that exhibits some of the characteristics of an ordinary particle, while having its existence limited by the uncertainty principle, which allows the virtual particles to spontaneously emerge from vacuum at short time and space ranges.
See Energy and Virtual particle
Vis viva
Vis viva (from the Latin for "living force") is a historical term used to describe a quantity similar to kinetic energy in an early formulation of the principle of conservation of energy.
Volcano
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
Walther Nernst
Walther Hermann Nernst (25 June 1864 – 18 November 1941) was a German physicist and physical chemist known for his work in thermodynamics, physical chemistry, electrochemistry, and solid-state physics.
Waste heat
Waste heat is heat that is produced by a machine, or other process that uses energy, as a byproduct of doing work.
Waste-to-energy
Waste-to-energy (WtE) or energy-from-waste (EfW) is the process of generating energy in the form of electricity and/or heat from the primary treatment of waste, or the processing of waste into a fuel source.
See Energy and Waste-to-energy
Waste-to-energy plant
A waste-to-energy plant is a waste management facility that combusts wastes to produce electricity.
See Energy and Waste-to-energy plant
Water
Water is an inorganic compound with the chemical formula.
See Energy and Water
Watt
The watt (symbol: W) is the unit of power or radiant flux in the International System of Units (SI), equal to 1 joule per second or 1 kg⋅m2⋅s−3.
See Energy and Watt
Wave function
In quantum physics, a wave function (or wavefunction) is a mathematical description of the quantum state of an isolated quantum system.
Weak interaction
In nuclear physics and particle physics, the weak interaction, also called the weak force, is one of the four known fundamental interactions, with the others being electromagnetism, the strong interaction, and gravitation.
See Energy and Weak interaction
William Rankine
William John Macquorn Rankine (5 July 1820 – 24 December 1872) was a Scottish mathematician and physicist.
See Energy and William Rankine
William Rowan Hamilton
Sir William Rowan Hamilton (3/4 August 1805 – 2 September 1865) was an Irish mathematician, astronomer, and physicist.
See Energy and William Rowan Hamilton
Work (physics)
In science, work is the energy transferred to or from an object via the application of force along a displacement. Energy and work (physics) are scalar physical quantities.
Work (thermodynamics)
Thermodynamic work is one of the principal processes by which a thermodynamic system can interact with its surroundings and exchange energy.
See Energy and Work (thermodynamics)
Zero-energy building
A Zero-Energy Building (ZEB), also known as a Net Zero-Energy (NZE) building, is a building with net zero energy consumption, meaning the total amount of energy used by the building on an annual basis is equal to the amount of renewable energy created on the site or in other definitions by renewable energy sources offsite, using technology such as heat pumps, high efficiency windows and insulation, and solar panels.
See Energy and Zero-energy building
See also
Main topic articles
- Academic discipline
- Business
- Communication
- Concept
- Culture
- Economy
- Education
- Energy
- Engineering
- Entertainment
- Entity
- Ethics
- Geography
- Government
- Health
- History
- Human behavior
- Humanities
- Information
- Internet
- Knowledge
- Language
- Law
- Life
- List
- Mass media
- Mathematics
- Military
- Nature
- Person
- Philosophy
- Politics
- Religion
- Science
- Society
- Sport
- Technology
- Time
- Universe
Nature
- Aesthetics of nature
- Back to nature
- Balance of nature
- Earth
- Ecosystem health
- Energy
- Evolution
- Life
- Matter
- Mfinda
- Natural environment
- Natural hazards
- Natural landscape
- Natural materials
- Natural product
- Natural products
- Natural risk
- Natural sciences
- Naturalism (philosophy)
- Nature
- Nature-based solutions
- Nurture
- Patterns in nature
- Phenomena
- Physis
- Preternatural
- Sky
- Space
- Supernatural
- Trogloxene
- Universe
- Urban nature
- Vacuum
Scalar physical quantities
- Action (physics)
- Angle
- Area
- Capacitance
- Energy
- Frequency
- Gravitational potential
- Length
- Luminous intensity
- Mass
- Number density
- Pressure
- Scalar (physics)
- Scalar field
- Scalar potential
- Temperature
- Thermodynamic beta
- Time
- Volume
- Wavenumber
- Work (physics)
Universe
References
Also known as Energetic, Energetically, Energies, Energise, Energisers, Energises, Energising, Energized (physics), Energizer (physics), Energizers, Energizes, Energizing, Energy (Earth science), Energy (biology), Energy (chemistry), Energy (cosmology), Energy (natural science), Energy (physical), Energy (physics), Energy form, Energy forms, Energy physics, Energy transfer, Form of energy, Forms of energy, Measurement of energy, Physical energy, Total energy.
, Ecosystem, Efficient energy use, Elastic energy, Electric battery, Electric charge, Electric generator, Electrical energy, Electromagnetic radiation, Electromagnetism, Electron, Electronvolt, Endothermic process, Energy, Energy conservation, Energy conversion efficiency, Energy crisis, Energy democracy, Energy development, Energy level, Energy recovery, Energy recycling, Energy storage, Energy transformation, Entropy, Environmental degradation, Enzyme, Equipartition theorem, Erg, Exergonic process, Exergy, Exothermic process, Explosive, Field (physics), First law of thermodynamics, Food chain, Foot-pound (energy), Force, Fossil fuel, Four-momentum, Frame of reference, Frequency, Friction, Friedrich Hasenöhrl, Fundamental interaction, Gamma-ray burst, Gaspard-Gustave de Coriolis, Geothermal energy, Glucose, Gottfried Wilhelm Leibniz, Gravitational collapse, Gravitational energy, Hadron, Hail, Hamiltonian (quantum mechanics), Hamiltonian mechanics, Harmonic oscillator, Heat, Heat death of the universe, Heat engine, Henri Poincaré, Human equivalent, Imperial and US customary measurement systems, Index of energy articles, Index of wave articles, Internal energy, International System of Units, Invariant mass, Ionization energy, Irreversible process, Isolated system, J. J. Thomson, James Prescott Joule, Josef Stefan, Joseph-Louis Lagrange, Josiah Willard Gibbs, Joule, Kilowatt-hour, Kinetic energy, Lagrangian mechanics, Lattice energy, Light, Line integral, Lipid, List of low-energy building techniques, Lord Kelvin, Lorentz scalar, Lorentz transformation, Machine, Macroscopic scale, Magnetic energy, Mass, Mass in special relativity, Mass–energy equivalence, Matter, Measurement, Mechanical energy, Mechanical wave, Metabolic pathway, Metabolism, Meteorology, Microscopic scale, Mitochondrion, Momentum, Motion, Mountain, National Science Teaching Association, Newton's laws of motion, Noether's theorem, Nova, Nuclear binding energy, Nuclear force, Nuclear fuel, Nuclear fusion, Nuclear physics, Nuclear reactor, Nuclear weapon, Nucleon, Nucleosynthesis, Orders of magnitude (energy), Organelle, Organism, Orogeny, Oscillation, Pair production, Particle physics, Pendulum, Philosophiæ Naturalis Principia Mathematica, Photon, Photon energy, Photosynthesis, Physical object, Physical property, Physical quantity, Physical system, Planck constant, Planck relation, Plasma (physics), Plasma globe, Plate tectonics, Population, Positron, Potential energy, Potentiality and actuality, Power (physics), Power station, Pressure, Principle of maximum entropy, Protein, Quantum, Quantum chromodynamics binding energy, Quantum mechanics, Quark, Quasar, Radiant energy, Radioactive decay, Renewable energy, Respiration (physiology), Reversible process (thermodynamics), Richard Feynman, Rotational energy, Rudolf Clausius, Schrödinger equation, Scientific American, Second law of thermodynamics, SI derived unit, Solar energy, Sound, Sound energy, Space, Spacetime, Special relativity, Speed, Speed of light, Spontaneous fission, Star, Statistical mechanics, Stearin, Stress–energy tensor, Supernova, Sustainable energy, System, Temperature, The Feynman Lectures on Physics, Thermal efficiency, Thermal energy, Thermodynamic equilibrium, Thermodynamic free energy, Thermodynamic process, Thermodynamic system, Thermodynamics, Thomas Young (scientist), Thorium, Tidal force, Tornado, Transducer, Translational symmetry, Tropical cyclone, Turbine, Uncertainty principle, Uranium, Van der Waals force, Virtual particle, Vis viva, Volcano, Walther Nernst, Waste heat, Waste-to-energy, Waste-to-energy plant, Water, Watt, Wave function, Weak interaction, William Rankine, William Rowan Hamilton, Work (physics), Work (thermodynamics), Zero-energy building.