Question

3. Energy is neither created nor destroyed in
a system, is known as :
(a) law of conservation of mass
(b) law of conversion of mass
(c) law of conservation of energy
(d) law of conversion of energy
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Answer 1

Answer:

The law of conservation of energy, also known as the first law of thermodynamics, states that the energy of a closed system must remain constant—it can neither increase nor decrease without interference from outside. ... The sum of these is called mechanical energy.

Explanation:

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Answer 2

Answer:

law of conservation of energy ,c