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 what is energy

Hi Abhishek!

In simple words, energy is the ability of a physical system to produce changes on other physical systems. Examples of energies are: light, sound, heat etc. The S.I. unit of energy is joules (J).

Cheers!!

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energy is ability to do work

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Energy is the ability to work . The S.I. unit of energy is Joules (J) .

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capacity of doing work is called energy. e.g. you are playing in the morning  but get exhausted till evening,it means your energy is spent

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energy is the ability to do work

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