Determine the amount of potential energy of a 5-newton book that is moved to three different shelves on a bookcase. the height of each shelf is 1.0 meters, 1.5 meters, and 2.0 meters.

Potential energy is defined as

here we have

mg = weight = 5 N

now for different heights we can say

U = mgh

so potential energy in all three shells will be different and increases with height

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.