Which of the following objects have gravitational potential energy?
*Select ALL that apply.
Ajet flying across the sky 4,000 m above the ground
An elephant walking 1.5 m/s along the ground
A concrete block sitting on the ground
An apple on a tree branch 3.0 m above the ground
A car traveling 20 m/s along a flat road

an apple on a tree branch 3m above the ground

Explanation:

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.

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