Lead is a soft, dense metal with a specific heat of 0.028 kcal/kg∙C°, a melting point of
328.0°C, and a heat of fusion of 5.5 kcal/kg. How much heat must be provided to melt a
250.0 kg sample of lead with a temperature of 20.0°C?

massxgravity x heght=weightxheight= pe

4900=490xh

h=10

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.

so easy. just google the electromagnetic waves and it’ll pop up.