Suppose the gravitational potential energy for a mass at an ...

[xclash]

Suppose the gravitational potential energy for a mass at an altitude of one Earth radius is PE1 and at two Earth radii is PE2 . How do the absolute values of these potential energies compare?
 a. PE1 = 2PE2
  b. PE1 = 4PE2
  c. PE1 < 2PE2
  d. PE1 > 2PE2 but is not equal to 4PE2

Question 2

A careful photographic survey of Jupiter's moon Io by the spacecraft Voyager 1 showed active volcanoes spewing liquid sulfur to heights of 70 km above the surface of this moon. If the value of g on Io is 2.0 m/s2, estimate the speed with which the liquid sulfur left the volcano.
 a. 260 m/s
  b. 530 m/s
  c. 790 m/s
  d. 970 m/s

[zogaridan]

Answer to Question 1

c

Answer to Question 2

b

[xclash]

Thanks for the timely response, appreciate it

[shewald78]

Great answer, keep it coming