Two identical bodies have internal energies u nct with constant c. the values of n and c are same for each body. the initial temperatures of the bodies are t, and t, respectivelly and they are used as source of work by connecting them to a carnot engine and bringing them to common final temperature t, then t, is tt d) t+t c) tt a) t,-t b) t, t level iv

the second one and the forth one are in the purple because they are opinions and the rest are in the yellow

explanation:

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.