Show that the unit for G, the universal gravitational constant, can be expressed as m^3 s^-2 kg^-1

Not sure what the question is asking

A1000-kg weather rocket is launched straight up. the rocket motor provides a constant acceleration for 16-s, then the motor stops. the rocket altitude 20-s after launch is 510-m. you can ignore any effects of air resistance. a. what was the rocket’s acceleration during the first 16-s? b. what is the rocket’s speed as it passes through a cloud 5100-m above the ground?

The amount of potential energy possessed by an elevated object is equal to what?

What causes the development of most clouds and precipitation in the atmosphere?