You are required to create a first class lever using a 1 meter rigid bar. If the lever has to have a mechanical advantage
of 6, where will you position the fulcrum from the load?
8.57 meters
1.66 meters
1.43 meters
8.33 meters

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.

i think the answer is a and b

i wish you luck