Suppose the rest mass of a spaceship is M. How much energy is required to accelerate it to speed βc?
a) M(1 - β²)c²
b) M(1 + β²)c²
c) Mβc²
d) M/(1 - β²)c²
(B) The Earth receives 1.55 × 10²2 J of energy from the Sun, each day. If we were a