Una barra de aluminio de 5,7 Kg se calienta a presión atmosférica (1 atm) de modo que su temperatura aumenta de 10 ºC a 75 ºC. Cuál es el trabajo consumido en la barra por la presión? α= 1.7 x 10-5 (ºC-1). DAl= 2.7 Kg/m3.

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.