#law_of_thermodynamics  (physics) a law governing the relations between states of energy in a closed system
  supertype:  law_of_nature__law  a generalization that describes recurring facts or events in nature: "the laws of thermodynamics"
  subtype:  second_law_of_thermodynamics  a law stating that mechanical work can be derived from a body only when that body interacts with another at a lower temperature; any spontaneous process results in an increase of entropy
  subtype:  third_law_of_thermodynamics  law stating that the entropy of a substance approaches zero as its temperature approaches absolute zero
  subtype:  zeroth_law_of_thermodynamics  the law that if two bodies are in thermal equilibrium with a third body then the first two bodies are in thermal equilibrium with each other
  subtype:  law_of_conservation_of_energy__conservation_of_energy__first_law_of_thermodynamics  the fundamental principle of physics that the total energy of an isolated system is constant despite internal changes

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