A point charge of +10 µC is placed at a distance of 20 cm from another identical point charge of +10 µC.

A point charge of -2 µC is moved from

point a to b as shown in the figure. Calculate the change in potential energy

of the system?

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.

i think it's 35 meters

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.