| 单词 | internal pressure |
| 释义 | > as lemmasinternal pressure internal pressure n. pressure acting on the inside of a container, pipe, etc., arising from a liquid or gas within it; (Physics) pressure within a liquid or gas arising from inward forces on molecules near the surface, as a result of intermolecular attraction.Technically defined as (∂U/ ∂V)T, internal pressure in the specific Physics sense is a measure of how the internal energy varies as the volume changes, the temperature remaining constant. ΘΚΠ the world > matter > physics > mechanics > force > [noun] > pressure > pressure within a fluid internal pressure1686 1686 Philos. Trans. 1685 (Royal Soc.) 15 1241 Upon this it is to be observed, that the bellow's can never be opened by the internal pressure, unless the sayd pressure be stronger then the externall. 1754 W. Emerson Princ. Mech. 170 The internal pressure at O exceeds the external, by the weight of the column of water AO. 1911 Trans. Faraday Soc. 7 94 It is therefore immaterial..whether we fix our attention on the internal pressure or on the thermal pressure, which acts in the opposite sense. 2010 M. E. Tuckerman Statist. Mech. v. 214 In order to maintain a fixed internal pressure, the volume of the system must be allowed to fluctuate. < as lemmas |
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