Physics, 07.10.2021 07:10, Feiee1

Two oppositely travelling beams of electrons, each having a total energy of 0.851667 MeV and 0.63875 MeV as observed in the lab. What are their respective velocities, momenta, and kinetic energies? What is the relative speed of an electron in the inertial reference system another electron?

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Two oppositely travelling beams of electrons, each having a total energy of 0.851667 MeV and 0.63875...