Hello, I hope you are doing well. I need help with Part B and Part C only. I already solved Part A.

Part A lo, a satellite of Jupiter, is the most volcanically active moon or planet in the solar system. It has volcanoes that send plumes of matter over 500 km high. Due to the satellite's small mass, the acceleration due to gravity on lo is only 1.81 m/s, and lo has no appreciable atmosphere. Assume What must be the speed of material just as it leaves the volcano to reach an altitude of 420 km? that there is no variation in gravity over the distance traveled. Express your answer in meters per second. v = 1200 m/s Submit Previous Answers Correct Part B If the gravitational potential energy is zero at the surface, what is the potential energy for a 15 kg fragment at its maximum height (500 km) on lo? Express your answer in joules. JA AED ? U = Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Part C How much would this gravitational potential energy be if it were at the same height (500 km) above earth? Express your answer in joules. AEd 0 = ] ? Submit Request