The rest energy of an electron is 0.511 MeV. If the electron is moving with a velocity v = 0.8 c, where c is the speed of light in vacuum:
a) What is the relativistic mass of the electron for this speed?
b) What is the total relativistic energy?
Data: Absolute value of electron charge e = 1.6 × 10 ^ -19 C
Speed of light in vacuum c = 3 × 10 ^ 8 m / s