Energy

Definition

Energy is the quantitative property that is transferred to a body or to a physical system, recognizable in the capacity to do work and in the form of heat and light. Energy is a conserved quantity—the law of conservation of energy states that energy can be converted in form, but not created or destroyed. The unit of measurement for energy in the International System of Units (SI) is the joule (J).

Related concepts

Abiogenesis Acceleration Accretion (astrophysics)Activation energy Adaptive management Adenosine diphosphate Adenosine triphosphate Adiabatic process Advection Agricultural land Air pollution Air quality index Air quality law Airborne wind energy Airshed Albert Einstein Alexis Clairaut An Inquiry Concerning the Source of the Heat Which Is Excited by Friction Analytical mechanics Ancient Greek language Angular acceleration Angular displacement Angular frequency Angular momentum Angular velocity Animal Antimatter Appell's equation of motion Applied mechanics Aquifer Aquifer storage and recovery Arable land Archaea Aristotle Arrhenius equation Astrobiology Atmosphere Atmosphere of Earth Atomic nucleus Augustin-Louis Cauchy Available energy Bacteria Basal metabolic rate Basal metabolism rate Base units Battery (electric)Benjamin Thompson Benoît Paul Émile Clapeyron Bernard Koopman Big Bang Binding energy Biodiversity Bioenergetics Bioenergy Biological organisation Biology Biomass Biopiracy Bioprospecting Biosphere Black-body radiation Black holes Bohr theory Bridgman's thermodynamic equations British thermal unit Brownian ratchet Bush tucker Bushmeat Calculus Caloric theory Calorie Canonical conjugate Capacitor Carbohydrate Carbon dioxide Carbon fixation Carbon footprint Carl Gustav Jacob Jacobi Carnot's theorem (thermodynamics)Carnot heat engine Casimir force Catabolism Celestial mechanics Cell (biology)Cellular respiration Center-of-mass Centimetre gram second system of units Centrifugal force Centripetal force Chemical element Chemical energy Chemical explosive Chemical potential Chemical reaction Chemical thermodynamics Chemistry Christiaan Huygens Circular motion Cityscape Classical field theory Classical mechanics Classical physics Clausius theorem Clean Air Act (United States)Climate Climate change and fisheries Closed system Cloud Coal Cogeneration Combustion Common-pool resource Common land Commons Compact object Compressibility Concentrated solar power Conflict resource Conjugate variables Conjugate variables (thermodynamics)Conservation law Conservation of energy Conservation of mass Conservation of probability Conservative force Conserved quantity Constantin Carathéodory Continental drift Continuum mechanics Control volume Coriolis force Coulomb's law Couple (mechanics)Crystal D'Alembert's principle Damping Daniel Bernoulli Dark energy Degrees of freedom (physics and chemistry)Desalination Dimensional analysis Displacement (geometry)Distribution (mathematics)Drainage basin Drinking water Dynamics (mechanics)Earth Earth's energy budget Earth's internal heat budget Earth Overshoot Day Earth science Earthquake Ecological economics Ecological niche Ecology Ecosystem Ecosystem service Edmond Halley Edward Routh Efficient energy use Elastic energy Electric battery Electric charge Electric energy Electric generator Electric potential energy Electric power Electrical energy Electricity Electricity delivery Electromagnetic energy Electromagnetic radiation Electromagnetism Electron Electronvolt Electrostate Emissions trading Enclosure Endoreversible thermodynamics Endotherm Endothermic process Energeia Energetic (disambiguation)Energy (disambiguation)Energy Transfer Partners Energy carrier Energy condition Energy conservation Energy consumption Energy conversion efficiency Energy crisis Energy democracy Energy development Energy efficiency in agriculture Energy efficiency in transport Energy engineering Energy in Africa Energy in Asia Energy in Australia Energy in Europe Energy in Mexico Energy in South America Energy in the United States Energy in work Energy law Energy level Energy operator Energy policy Energy policy of Canada Energy recovery Energy recycling Energy security Energy state Energy storage Energy supply Energy system Energy transfer Energy transformation Energy transition Energy–momentum 4-vector Enthalpy Entropic force Entropy Entropy (arrow of time)Entropy (energy dispersal)Entropy and life Environmental good Enzyme Equation of state Equations of motion Equilibrium state Equilibrium thermodynamics Equipartition principle Erg Erwin Schrödinger Eugene Wigner Eukaryote Euler's equations (rigid body dynamics)Euler's laws of motion Exergonic Exergy Exothermic process Exploitation of natural resources Fauna Fictitious force Field (agriculture)Field (physics)First law of thermodynamics Fisheries law Fisheries management Fishery Fission bomb Flood Flora Food Food calorie Food chain Food energy Foot-pound Foot-pound (energy)Force Force (physics)Forest Forest genetic resources Forest management Forestry law Fossil fuel Fossil fuel power station Frame dependent Frame of reference François Massieu Free entropy Free expansion Frequency Fresh water Friction Friedrich Hasenöhrl Fuel Fuel gas Fuel oil Fundamental forces Fundamental interactions Fundamental thermodynamic relation Fungus Future of Earth Gaia hypothesis Galileo Galilei Game (hunting)Game law Gamma-ray burst Gas giant Gas laws Gemstone Gene bank Geologic time scale Geological history of Earth Geology Georg Ernst Stahl Geothermal energy Geothermal power Gibbs free energy Gilbert N. Lewis Glacier Global commons Glucose Gottfried Leibniz Gravitational binding energy Gravitational collapse Gravitational energy Gravitational potential Gravitational potential energy Groundwater Groundwater pollution Groundwater recharge Groundwater remediation Gustave-Gaspard Coriolis Habitat conservation Hadron Hail Hamilton's equations Hamiltonian (quantum mechanics)Hamiltonian mechanics Hamiltonian operator Hamilton–Jacobi equation Harmonic oscillator Hawking radiation Heat Heat capacity Heat death of the universe Heat death paradox Heat engine Heat pump and refrigeration cycle Heat transfer Heisenberg Uncertainty Principle Helmholtz free energy Henri Poincaré Herbert Callen Hermann von Helmholtz History of Earth History of classical mechanics History of energy History of entropy History of life History of perpetual motion machines History of thermodynamics Huerta Hugh Everett III Human equivalent Hydroelectricity Hydrogen Hydrogen fuel Hydropower Hydrosphere Ice Iceberg Ideal gas Ideal gas law Imperial and US customary measurement systems Improved sanitation Improved water source Impulse (physics)Index of energy articles Index of wave articles Indoor air quality Industrial mineral Inertia Inertial frame of reference Integrated gasification combined cycle Intensive and extensive properties Interatomic potential Internal energy Internal structure of Earth International System of Units International Treaty on Plant Genetic Resources for Food and Agriculture International Union for the Protection of New Varieties of Plants Intrinsic mass Introduction to entropy Invariant mass Ionization energy Irreversible process Irrigation Isaac Newton Isenthalpic process Isentropic process Isobaric process Isochoric process Isolated system Isothermal process J. J. Thomson James Clerk Maxwell James Prescott Joule Jean le Rond d'Alembert Jeremiah Horrocks Jevons paradox Johann Bernoulli Johannes Diderik van der Waals Johannes Kepler John James Waterston John Smeaton John von Neumann Joseph-Louis Lagrange Joseph Liouville Joseph von Fraunhofer Josiah Willard Gibbs Joule Jožef Stefan Julius von Mayer Jupiter Kilocalorie Kilowatt-hour Kinematics Kinetic energy Kinetics (physics)Koopman–von Neumann classical mechanics Lagrangian mechanics Land Land-use planning Land (economics)Land degradation Land law Land management Land use Landscape Lars Onsager Latent heat Latin language Lattice energy Laws of thermodynamics Leaching (agriculture)Leonhard Euler Life Light Light energy Lightning Line integral Linear motion Lipid List of important publications in physics List of low-energy building techniques List of plants used in herbalism List of textbooks on classical mechanics and quantum mechanics List of thermodynamic properties Literal translation Long-Qing Chen Lord Kelvin Lorentz boost Lorentz scalar Lorentz transformations Loschmidt's paradox Ludwig Boltzmann Machine Macroscopic Magnetic energy Malcolm Longair Many-worlds interpretation Marine conservation Marine energy Marine resources Mass Mass in special relativity Mass–energy equivalence Material properties (thermodynamics)Matter Max Planck Maxwell's demon Maxwell's thermodynamic surface Maxwell relations Meadow Mechanical energy Mechanical equivalent of heat Mechanical power (physics)Mechanical wave Mechanical work Mechanics Megajoule Metabolic equivalent of task Metabolic pathway Metabolism Metal Meteorology Metereology Microscopic Mineral Mineral rights Mining Mining law Mitochondrion Moment (physics)Moment of inertia Momentum Moonlight Motion Motion (physics)Mountain National Ambient Air Quality Standards National Institute of Standards and Technology Natural capital Natural capital accounting Natural environment Natural gas Natural heritage Natural resource Natural resource economics Natural resource management Natural uranium Nature Nature-based solutions Nature reserve Negative energy Negative mass Negentropy Newton's law of universal gravitation Newton's laws of motion Newton (unit)Newtonian mechanics Nicolas Léonard Sadi Carnot Niels Bohr Noether's theorem Non-equilibrium thermodynamics Non-inertial reference frame Non-renewable resource Non-timber forest product Nova Nuclear binding energy Nuclear decay Nuclear force Nuclear fuel Nuclear fusion Nuclear physics Nuclear potential energy Nuclear power Nuclear power plant Nuclear reactor Nucleation Nucleons Nucleosynthesis Ocean Oil refinery Oil war On the Equilibrium of Heterogeneous Substances Onsager reciprocal relations Open space reserve Orders of magnitude (energy)Ore Organelle Organism Orogenesis Oscillation Outline of energy Overexploitation Ozone depletion Pair creation Particle Particle number Particle physics Pasture Paul Émile Appell Peak coal Peak copper Peak farmland Peak gas Peak minerals Peak oil Peak phosphorus Peak water Pendulum Pendulum (mechanics)Penrose process Percy Williams Bridgman Peter Tait (physicist)Petro-Islam Petroleum Petroleum politics Petrostate Phantom energy Phase (matter)Philosophiæ Naturalis Principia Mathematica Philosophy of thermal and statistical physics Photon Photon energy Photosynthesis Photovoltaic system Physical body Physical cosmology Physical property Physical quantity Physical system Physiological Zoology Pierre-Simon Laplace Pierre Duhem Pierre Louis Maupertuis Planck constant Planck relation Planetary differentiation Plant Plant genetic resources Plasma (physics)Plasma globe Plate tectonics Polar ice cap Polytropic process Positron Potassium-40 Potential energy Power (physics)Power station Power usage effectiveness Pressure Primary energy Principle of maximum entropy Process function Prokaryote Property law Protein Protist Quantum Quantum chromodynamics binding energy Quantum fluctuation Quantum mechanics Quantum potential Quantum thermodynamics Quark Quasar Quasistatic process Quintessence (physics)REDD and REDD+Radiant energy Radiation Radioactive decay Radiogenic heat Radiogenic nuclide Radioisotope thermoelectric generator Rain Rainwater harvesting Rangeland Reactive centrifugal force Real gas Reclaimed water Reduced properties Reference frame Reflections on the Motive Power of Fire Relative velocity Relativistic mass Remnant natural area Renewable energy Renewable resource Resource Resource curse Resource depletion Resource extraction Resource nationalism Resource war Rest Mass Rest energy Rest mass Reversible process (thermodynamics)Richard Feynman Rigid body Rigid body dynamics Roger Penrose Romanization of Ancient Greek Rotating reference frame Rotation around a fixed axis Rotational energy Rotational frequency Routhian mechanics Rudolf Clausius SI base unit SI derived unit SI unit Sand mining Sanitation Saturn Schrödinger equation Science and Children Seascape Second law of motion Second law of thermodynamics Sedimentation Seed bank Self-assembly Self-organization Sewage Shade (shadow)Simple harmonic motion Siméon Denis Poisson Snow Soil Soil conservation Soil fertility Soil health Soil resilience Solar energy Solar furnace Solar irradiance Solar power Solar power tower Solar thermal energy Sound Sound energy Sound wave Soundscape Space Spaceflight Spacetime Special relativity Spectral lines Speed Speed of light Spontaneous fission Star State function State of matter Statics Statistical mechanics Stearin Stormwater Stress–energy tensor Sunlight Supernova Surface energy Surface water Sustainable energy Synergetics (Haken)System Systems ecology Table of thermodynamic equations Tangential speed Temperature The Feynman Lectures on Physics Thermal efficiency Thermal energy Thermal equilibrium Thermal expansion Thermal reservoir Thermodynamic cycle Thermodynamic databases for pure substances Thermodynamic diagrams Thermodynamic equations Thermodynamic equilibrium Thermodynamic free energy Thermodynamic instruments Thermodynamic potential Thermodynamic process Thermodynamic state Thermodynamic system Thermodynamic temperature Thermodynamics Third law of thermodynamics Thomas Young (scientist)Thorium Thorium-232 Théophile de Donder Tidal interactions Tidal power Tide Time Timeline of classical mechanics Timeline of heat engine technology Timeline of thermodynamics Timeline of thermodynamics, statistical mechanics, and random processes Tornado Torque Tragedy of the commons Transducer Translational symmetry Tropical cyclone Turbine Turbo generator Units of energy Universe Uranium Uranium-235 Urban ecology Vacuum energy Van der Waals force Vapor quality Velocity Vibration Viewshed Virtual particles Virtual photons Virtual work Virus Vis viva Volcano Volume (thermodynamics)Walther Nernst Waste-to-energy Waste-to-energy plant Waste heat Water Water (molecule)Water conflict Water conservation Water efficiency Water law Water pollution Water privatization Water quality Water resource policy Water resources Water right Water scarcity Water security Water supply Watt Wave farm Wave function Wave function collapse Weak force Weather Werner Heisenberg Wilderness Wildfire Wildlife Wildlife conservation Wildlife management William Hyde Wollaston William John Macquorn Rankine William Rowan Hamilton Wind Wind farm Wind power Wood Work (physics)Work (thermodynamics)World energy resources World energy supply and consumption Zero-energy building Zero-point energy Zeroth law of thermodynamics Émilie du Châtelet

83 concepts already in your glossary