A cylindrical metal shell has an inner radius A, an outer radius B, and a very long length L. The shell has total net charge of Q placed on it. Assume that L >> B > A so that any charge on the ends can be ignored.
What is the charge density on the outer shell and what is the charge density on the inner shell?
In other words, what is: σouter ; σinner ?

12000j is work done

an electric circuit

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.