A 1.0\,\text {kg}1.0kg1, point, 0, start text, k, g, end text toy car is released at the top of a frictionless track on the left and rolls off of the track from its right side ramp. The car starts at a height of 0.80\,\text m0.80m0, point, 80, start text, m, end text, goes through a 0.50\,\text m0.50m0, point, 50, start text, m, end text diameter loop, and exits the ramp at a height of 0.25\,\text m0.25m0, point, 25, start text, m, end text. help please

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.