At the end of the Fermilab Alvarez Linac and side-coupled cavity linac the protons have a kinetic energy of 400 MeV. Calculate their total energy, their momentum and their velocity in units of the velocity of light. Rest mass of proton is 938.27 MeV.  Ensure to show all work and assumptions made. Write your response with exactly 6 paragraphs, separated with the markdown divider: ***.
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