单词 | internal energy |
释义 | > as lemmasinternal energy internal energy n. †(a) intrinsic energy of a person or thing, independent of any external relations (cf. autokinesy n.) (obsolete); (b) Physics the energy in a physical system arising from the positions and relative motions and interactions of its constituents; symbol U.A system's thermodynamic internal energy is a state function (state function n. 3) such that any change in its value is equal to the sum of the heat absorbed by it and the work done on it; its absolute magnitude is typically undefined, only changes in its value being measurable. ΘΚΠ the world > matter > physics > energy or power of doing work > [noun] > specific types of energy internal energy1654 positive energy1807 chemical energy1809 energy1852 potential energy1853 atomic energy1854 latent energy1854 static energy1869 free energy1884 rest energy1925 nuclear energy1958 radial energy1959 tangential energy1959 geothermal1960 dark energy1998 quintessence1998 1654 W. Charleton Physiologia Epicuro-Gassendo-Charltoniana ii. iv. 126 Those [Positions] which we may with good advantage substitute..are (1) That Atoms were produced ex nihilo, or created by God, as the sufficient Materials of the World..; (2) that, at their Creation, God invigorated or imprægnated them with an Internal Energy, or Faculty Motive, which may be conceived the First Cause of all Natural Actions. 1704 J. Toland Lett. Serena v. 193 You must always distinguish between the internal Energy, Autokinesy, or essential Action of all Matter,..and the external local Motion or Changes of Place. 1867 J. C. Maxwell in Philos. Trans. (Royal Soc.) 157 57 We suppose the molecules to be bodies, or systems of bodies, capable of rotation, internal vibration, or any form of energy other than simple motion of translation... The value of θ and the final velocities of the molecules will depend on the amount of internal energy in each molecule before the encounter. 1921 A. W. Judge Automobile & Aircraft Engines ii. 60 The internal energy of a given quantity of gas depends only upon its temperature. 2010 P. W. Atkins Laws of Thermodynamics: Very Short Introd. iii. 51 The first law and the internal energy identify the feasible change among all conceivable changes: a process is feasible only if the total energy of the universe remains the same. < as lemmas |
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