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Does the mass-energy equivalence mean that if we heat a body then its mass will increase?

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- Thread starter Robin04
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- #1

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Does the mass-energy equivalence mean that if we heat a body then its mass will increase?

- #2

CWatters

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Yes. Google will find an explanation.

- #3

CWatters

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I should add it's a very small effect. E=mc^2 so m=E/c^2 and c is big.

- #4

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So this means that the mass is not only dependent on the quantity of matter in that object, right?

- #5

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E and p are of course frame-dependent, but it turns out that m is not, so it is a good and non-problematic generalisation of Newtonian mass. Contrary to what is known as "relativisitc mass"...

- #6

anorlunda

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https://en.m.wikipedia.org/wiki/Invariant_mass

Warning, some of that article is more advanced than B level.

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