Shown in the diagram a 4800 kg cable cars descending a Highhill a counterweight of mass 4600 kg on the other side of the hill age the brakes in controlling the cable car speed the Rolling friction of both the cable car and the counterweight are negligible  how much braking force does the cable car need to descend constant speed

magnified images possible images can be real = projected onto a screen

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.