Eli5: what exactly is energy?

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Like, i know it’s the ability to do work and all that, but this isn’t what energy is, it’s what energy does. What IS energy tho?

In: Physics

29 Answers

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All matter around us is made up of massive atoms. The mass of a body represents its internal energy, which is expressed by the famous expression E = mc² discovered by Albert Einstein (c being the speed of light).

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