Arefrigeration cycle operating between two reservoirs receives energy qc from a cold reservoir at tc = 275 k and rejects energy qh to a hot reservoir at th = 315 k. for each of the following cases, determine whether the cycle operates reversibly, operates irreversibly, or is impossible: (a) qc = 100 kj, wcycle = 80 kj. (b) qc = 1200 kj, qh = 2000 kj. (c) qh = 1575 kj, wcycle = 100 kj. (d) β = 8.

answer: i pick a

explanation:

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask

true is the correct answer

hope i

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.