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abstraction > hypothesis > theory > law > conservation law > conservation of energy |
conservation of energy comparison table |
Subject | is a kind of | has conserved quantity | has definition |
---|---|---|---|
conservation law | law | A quantity that remains unchanged in the course of the evolution of a dynamical system. There are seven known quantities that are conserved: energy (including mass), momentum, angular momentum (including spin), charge, electron-family number, muon-family number, and baryon-family number. | |
conservation of energy | conservation law | energy | The total energy of a system (including kinetic energy and gravitational energy) is conserved and does not vary. Thus, kinetic energy can only increase at the expense of gravitational potential energy. Modern physics has modified the law of conservation of energy, since matter can be created or annihilated; a more general law is the conservation of mass and energy. |
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