Question

When heat passes from a hot to a cold body there is a change in mass. Do you agree?

Answer 1

Answer:

Yes

Explanation:

Becuse there is an expansion in the object as the molecules in it start moving rapidly.

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Answer 2

Yes, in a reference frame where the total momentum of the composite object is zero, then E = m c 2 , and that includes thermal energy. Thermal energy is very, very, very small, so no, it is not measurable as mass. Yes mass does change but it is counted as negligible.

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