Question

what is energy ? (define)
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Answer 1

The ability to be very active or do a lot of work without getting tired is called energy.

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Answer 2

In physics, energy is the quantitative property that must be transferred to a body or physical system to perform work on the object, or to heat it. Energy is a conserved quantity; the law of conservation of energy states that energy can be converted in form, but not created or destroyed.

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