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Two electrons, A and B are approaching each other along a common straight line. Each has a
constant speed of 0.6c as measured in the laboratory. What is the total energy of electron B as
measured in the rest frame of A? Electron rest mass = 0.51 MeV/c.
a) 3.1 MeV
b) 1.1 MeV
c) 6.3 MeV
d) 0.7 MeV
e) 5.4 MeV
f) 2.3 MeV

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