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12 June, 13:37

What is energy? it's from my physics book

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  1. 12 June, 13:49
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    Energy is the capacity of doing work
  2. 12 June, 13:52
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    the capacity of doing work is called energy

    it's si unit is Joule

    it's CGS unit is calories

    4.2J=1calorie

    there are various forms of energy
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