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4.The kinetic energy and the momentum of a particle deduced from measurements on its track in...

4.The kinetic energy and the momentum of a particle deduced from measurements on its track in nuclear photographic emulsions are 250MeV and 368 MeV/c, respectively. Determine the mass of the particle in terms of electron mass?

5. A particle of rest mass m with kinetic energy 3mc2 makes a completely elastic collision with an identical particle that is at rest, forming a new particle of rest mass M. Determine mass M?

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