A 20.0 g ball is pushed against the spring of a toy gun. The spring constant is 200. N/m. Use conservation of energy If the spring was compressed 5.0 cm, how much elastic potential energy does the toy gun have? If the trigger is pulled and the spring comes to its original, uncompressed position, what will be the speed given to the ball? If the toy gun had been pointed vertically upward when the trigger was pulled, how high will the ball rise above the uncompresssed position of the spring?

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.

that would be because of both gravity and friction. so     c