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11 votes
2 answers
825 views

What is the definition of mass?

From what I have seen so far, there seem to be two fundamental criteria for considering something to have mass: First is that it must have inertia and therefore momentum, Second is that it interacts ...
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1 vote
2 answers
175 views

Is inertia and gravity determined by relativistic mass or invariant mass?

As far as I know, mass fundamentally determines inertia and the gravitational force. But since there are two types of mass, which mass determines which? From what I have read so far, and correct me if ...
Neelim's user avatar
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