(a) Determine the escape velocity from the Sun for an object at the Sun's surface (r = 7.5 × 105 km, M = 2.0 × 1030 kg).
(b) Determine the escape velocity from the Sun for an object at the average distance of the Earth (1.50 × 108 km).
(c) What is the ratio of the escape velocity in (b) to the speed of the Earth in its orbit?