An object of mass m slides down an incline with angle e. Which equation allows you to correctly calculate the normal force on the object?
A. Fn-mg sin(e) = 0
B. Fn-mg cos(e) = mg
C. Fn-mg cos(e) = 0
D. Fn- mg sin(e) = mg

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.

answergravity;