Question

hiiiiii guys........ why is mass not an invariant quantity?​

Answer 1

Answer:

In general, for isolated systems and single observers, relativistic mass is conserved (each observer sees it constant over time), but is not invariant (that is, different observers see different values). ... However, this quantity, like the total energy of a particle, is not invariant

Explanation:

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Answer 2

Answer:

I think that mass is variant quantity......

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