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noun, Physics.
the principle that in any closed system subjected to no external forces, the mass is constant irrespective of its changes in form; the principle that matter cannot be created or destroyed.
the principle that the total mass of any isolated system is constant and is independent of any chemical and physical changes taking place within the system
conservation of mass
A principle of classical physics stating that the total mass of a closed system is unchanged by interaction of its parts. The principle does not hold under Special Relativity, since mass and energy can be converted into one another.


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  • Conservation of momentum

    noun 1. the principle that the total linear or angular momentum in any isolated system is constant, provided that no external force is applied conservation of momentum A conservation law stating that the total linear momentum of a closed system remains constant through time, regardless of other possible changes within the system.

  • Conservation of parity

    noun 1. the principle that the parity of the total wave function describing a system of elementary particles is conserved. In fact it is not conserved in weak interactions

  • Conservative-baptist

    noun 1. a member of a Protestant denomination (Conservative Baptist Association of America) organized in Milwaukee, Wisconsin, in 1948.

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