energy density
81Mass–energy equivalence — E=MC2 redirects here. For other uses, see E=MC2 (disambiguation). 4 meter tall sculpture of Einstein s 1905 E = mc2 formula at the 2006 Walk of Ideas, Berlin, Germany In physics, mass–energy equivalence is the concept that the …
82Electromagnetic stress-energy tensor — In physics, the electromagnetic stress energy tensor is the portion of the stress energy tensor due to the electromagnetic field. Definition In free space in SI units, the electromagnetic stress energy tensor is:T^{mu u} = frac{1}{mu 0} [ F^{mu… …
83Electric potential energy — Electromagnetism Electricity · …
84Superconducting magnetic energy storage — (SMES) systems store energy in the magnetic field created by the flow of direct current in a superconducting coil which has been cryogenically cooled to a temperature below its superconducting critical temperature. A typical SMES system includes… …
85Compressed-air energy storage — (CAES) refers to the compression of airto be used later as energy source. At utility scale, it can be stored during periods of low energy demand (off peak), for use in meeting periods of higher demand (peak load). Alternatively it can be used to… …
86Grid energy storage — is used to manage the flow of electrical energy. For large scale load levelling on an interconnected electrical system, electric energy producers send low value off peak excess electricity over the electricity transmission grid to temporary… …
87Food energy — is the amount of energy obtained from food that is available through cellular respiration. Food energy is expressed in food calories (labeling: EU kcal, U.S. calories) or kilojoules (kJ). Food calories, or the calorie units used often in… …
88Radiant energy — Visible light (a form of radiant energy) scattered by fog in a forest. Radiant energy is the energy of electromagnetic waves.[1] The quantity of radiant energy may be calculated by integrating radiant flux (or power) with respect to time and …
89Orders of magnitude (density) — Skylab measured several orders of magnitude of the Sun s density (top scale: 10−18 to 10−6 g⋅cm−3, equivalent to 10−15 to 10−3 kg⋅m−3) at different temperatures and heights above its surface. List of orders of magnitude for density less than …
90spectral density of radiant energy — spektrinis spinduliuotės energijos tankis statusas T sritis Standartizacija ir metrologija apibrėžtis Pasirinktosios spektro dalies vienetinio dažnio ar bangos ilgio intervalo vidutinė spinduliuotės energijos vertė. atitikmenys: angl. spectral… …
