Areciprocating compressor is a device that compresses air by a back-and-forth straight-line motion, like a piston in a cylinder. consider a reciprocating compressor running at 150 rpm . during a compression stroke, 1.60 mol of air is compressed. the initial temperature of the air is 390 k, the engine of the compressor is supplying 7.4 kw of power to compress the air, and heat is being removed at the rate of 1.4 kw . calculate the temperature change per compression stroke.

pe = weightxheight = 2000x1000=2,000,000joules

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.

option number c is the right answer.