| NOUN | cognition | first law of thermodynamics, conservation of energy, law of conservation of energy | the fundamental principle of physics that the total energy of an isolated system is constant despite internal changes |
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| Meaning | The fundamental principle of physics that the total energy of an isolated system is constant despite internal changes. | |
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| Synonyms | conservation of energy, law of conservation of energy | |
| Broader | conservation | (physics) the maintenance of a certain quantities unchanged during chemical reactions or physical transformations |
| law of thermodynamics | (physics) a law governing the relations between states of energy in a closed system | |
| Spanish | primera ley de la termodinámica | |
| Catalan | conservació de l'energia, primera llei de la termodinàmica, primer principi de la termodinàmica | |
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