I need help is due in 10 min 1. Determine the gain in gravitational potential energy

I need help is due in 10 min 1. Determine the gain in gravitational potential energy when a 4.00 kg rock is raised 18.000 m.

2. A leopard with a mass of 55.00 kg climbs 12.0 m up a tree. What is its gain in GPE?

3. An aircraft is taking a group of skydivers up into the air. Evan is dressed in his parachuting outfit, which brings his mass to a total of 90.0 kg. The aircraft takes the group to a height of 5000.00 m before the jump. How much GPE does Evan gain before jumping?

4. An owl has a mass of 4.00 kg. It dives to catch a mouse, losing 800.00 J of its GPE. What was the starting height of the owl, in meters?

5. The moon has a different gravity constant than Earth. An astronaut with a mass of 110.0 kg climbs 5.0 m up a ladder, increasing his GPE by 880.0 J. What is the strength of gravity on the Moon?

6. One of the tallest radio towers is in Fargo, North Dakota. The tower is 629.9 m tall. If a bird lands on top of the tower, so that the gravitational potential energy associated with the bird is 2033.76 J, what is its mass, in kilograms?

7. The largest sea turtle found in the U.S. had a mass of 860.24 kg. If the GPE associated with the turtle as it was being lifted onto a ship was 20,320.7 J, how high above the water was the turtle?

8. The most massive piece of equipment ever carried by a plane was a 12,400.05-kg generator in 1993. How far above the ground was the generator when the GPE associated with it was 91,700,000.00 J?