If gas giants are mostly made of gas what is the force acting upon them to keep them spherical?

An atom with 7 protons, 6 neutrons, and 7 electrons has an atomic mass of amu. (enter a whole number.) numerical answers expected! answer for blank 1:

Describe the forces both attractive and repulsive that occur as two atoms move closer together.

A40 kilogram skier starts at the top of a 12 meter high slope. at the bottom, she is travelling 10 meters per second. how much energy does she lose to friction