Apiston–cylinder device with a set of stops initially contains 0.6 kg of steam at 1.0 mpa and 400°c. the location of the stops corresponds to 40 percent of the initial volume. now the steam is cooled. determine the compression work if the final state is (a) 1.0 mpa and 250°c and (b) 500 kpa. (c) also determine the temperature at the final state in part (b).

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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.