What is the physical representation of the area under a force versus extension or compression curve?

a. acceleration
b. kinetic energy
c. velocity
d. potential energy
e. none of the above

The compression curve would be theoretically given for a system of bodies in which the spring applies the force (Although in the same way the following process can be extrapolated to any system, depending on the type of Force to consider) For a spring mass system, the strength is given by Hooke's law as

Where,

K  = Spring constant

x = Displacement

If we integrate based on distance we would have

This integral represents the area under the Force Curve based on each distance segment traveled.

This is the same formula that represents the elastic potential energy of a body. Therefore the correct answer is D.

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.

where is the photo and the answer choices?