first law of thermodynamics

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Synonyms for first law of thermodynamics

the fundamental principle of physics that the total energy of an isolated system is constant despite internal changes

References in periodicals archive ?
The 1st Law RHR results mirror the same trends seen in the pressure traces, and are given for the 25%, 50%, 75%, and 100% load conditions in Figure 2.
By examing [N.sub.2]O concentrations and their relationships to controlling variables in 2 New Zealand soils beneath grazed pasture, the objectives of this study were to: (i) predict [N.sub.2]O emission by applying Fick's 1st Law, (ii) evaluate the subsurface gas sampling system in soils with contrasting drainage and moisture regimes, and (iii) determine the direct [N.sub.2]O emission factor (i.e.