The rest energy of an electron is 0.511 MeV. The rest energy of a proton is 938 MeV. Assume both particles have kinetic energies of 1.70 MeV. (a) Find the speed of the electron. c (b) Find the speed of the proton. c (c) By how much does the speed of the electron exceed that of the proton? c (d) Repeat the calculations assuming both particles have kinetic energies of 1800 MeV. electron's speed m/s proton's speed m/s exceeded speed m/s