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In a certain reference frame, a particle with momentum of 7 MeV/c and a total energy of 10 MeV.
(a) Determine the mass of the particle.
MeV/c2
(b) What is the total energy of the particle in a reference frame in which its momentum is 5 MeV/c?
MeV
(c) What is the relative speed of the two reference frames?
c
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