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The law of conservation is a principle in physics that states that a certain physical property (that is, a measurable quantity) does not change in the course of time within an isolated physical system 12. The law of conservation is a fundamental concept in physics and is applied to various physical properties such as energy, momentum, angular momentum, mass, and electric charge 1. Conservation laws make it possible to predict the macroscopic behavior of a system without having to consider the microscopic details of the course of a physical process or chemical reaction 1.
For example, the conservation of energy implies that energy can be neither created nor destroyed, although it can be changed from one form (mechanical, kinetic, chemical, etc.) into another 13. Similarly, the conservation of mass implies that matter can be neither created nor destroyed, and processes that change the physical or chemical properties of substances within an isolated system (such as conversion of a liquid to a gas) leave the total mass unchanged 14. The conservation of linear momentum expresses the fact that a body or system of bodies in motion retains its total momentum, the product of mass and vector velocity, unless an external force is applied to it 12.
Do you have any other questions about the law of conservation?