- Gravitational energy
Gravitational energy is the energy associated with the gravitational field.
classical mechanics, between two or more masses (or other forms of energy-momentum) a gravitational potential energy exists. Conservation of energyrequires that this gravitational potential field energy is always negative. [ Alan Guth" The Inflationary Universe: The Quest for a New Theory of Cosmic Origins" (1997), Random House , ISBN 0-224-04448-6 Appendix A: "Gravitational Energy" demonstrates the negativity of gravitational energy.]
general relativitygravitational energy is modeled via the Landau-Lifshitz pseudotensor[ Lev Davidovich Landau& Evgeny Mikhailovich Lifshitz, "The Classical Theory of Fields", (1951), Pergamon Press, ISBN 7-5062-4256-7 ] which allows the energy-momentum conservation laws of classical mechanicsto be retained. Addition of the matter stress-energy-momentum tensorto Landau-Lifshitz pseudotensor results in a combined matter plus gravitational energy pseudotensor which has a vanishing divergence. Some people object to this derivation on the grounds that pseudotensors are inappropriate in general relativity, but this treatment only required, in the conservation law, the use of the "derivative" of the combined pseudotensor which was, in this case, in fact a tensor! A [http://gravitywaves.0pixel.net/ study] , based on not unlike the times tide of sun and moon shows, directly, that the speed of gravity is equal to the speed of light.This means that the force of gravity is a wave electromagnetic that is travelling at 300.000 km for second.
Wikimedia Foundation. 2010.
Look at other dictionaries:
gravitational energy — gravitacinė energija statusas T sritis Standartizacija ir metrologija apibrėžtis Gravitacinio lauko energijos ir jo veikiamų kitų objektų energijos kiekių suma. atitikmenys: angl. gravitational energy vok. Gravitationsenergie, f rus.… … Penkiakalbis aiškinamasis metrologijos terminų žodynas
gravitational energy — gravitacinė energija statusas T sritis fizika atitikmenys: angl. gravitational energy vok. Gravitationsenergie, f rus. гравитационная энергия, f pranc. énergie de gravitation, f; énergie gravifique, f … Fizikos terminų žodynas
gravitational wave — n. a hypothetical wave of very weak gravitational energy that travels through space at the speed of light: thought to be caused by the sudden acceleration of a large mass: sometimes called gravitational radiation … English World dictionary
Energy — This article is about the scalar physical quantity. For other uses, see Energy (disambiguation). Energetic redirects here. For other uses, see Energetic (disambiguation) … Wikipedia
gravitational wave — noun : a hypothetical wave held to travel at the speed of light and to propagate the gravitational field * * * Astron., Physics. (in general relativity) a propagating wave of gravitational energy produced by accelerating masses, esp. during… … Useful english dictionary
Energy form — In the context of physical sciences, several forms of energy have been defined. These include: *Thermal energy popularly known as heat *Chemical energy *Electrical energy *Radiant energy commonly known as light energy *Nuclear energy *Magnetic… … Wikipedia
gravitational wave — Astron., Physics. (in general relativity) a propagating wave of gravitational energy produced by accelerating masses, esp. during catastrophic events, as the gravitational collapse of massive stars. Also called gravity wave. [1895 1900] * * * … Universalium
gravitational wave — gravita′tional wave′ n. astron. phs (in general relativity) a propagating wave of gravitational energy produced by accelerating masses … From formal English to slang
Gravitational lens — Gravitational Lensing Formalism Strong lensing … Wikipedia
Energy storage — is the storing of some form of energy that can be drawn upon at a later time to perform some useful operation. A device that stores energy is sometimes called an accumulator. All forms of energy are either potential energy (eg. chemical,… … Wikipedia