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What is energy?

What is energy?

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What is the concept of "energy" that we use so often? "Energy" (Greek ενεργια - action, activity) is a general quantitative measure of various forms of motion of matter. By and large, the concept of energy, the idea of ​​energy is artificial and created specifically to be the result of our reflections on the world around us. Unlike matter, about which we can say that it exists, energy is the fruit of human thought, his "invention", built in such a way that it would be possible to describe various changes in the surrounding world and at the same time talk about constancy, the preservation of which something that has been called energy. For this physical quantity, the term "living force", introduced by I. Newton, was used for a long time. For the first time in history, the concept of "living force" the meaning of "energy", without even uttering this word, is put by Robert Mayer in his article "Remarks on the forces of inanimate nature", published in 1842. The special term "energy" was introduced in 1807 by the English physicist Thomas Jung and denoted a quantity proportional to the mass and square of the speed of a moving body. In science, the term "energy" in its modern sense was introduced by William Thomson (Lord Kelvin) in 1860.

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Energy is a scalar physical quantity that is a single measure of various forms of motion and interaction of matter, a measure of the transition of the motion of matter from one form to another.

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