1. The problem statement, all variables and given/known data At sea level a nitrogen molecule in the air has an average translational KE of 6.2x10-21 J. Its mass is 4.7x10-26 kg. If the molecule could shoot straight up without striking other air molecules, how high would it rise? Thanks for any help. 2. Relevant equations I think to find height I should use the equation U=mgy but I'm not 100% sure because I don't understand how KE relates to U. 3. The attempt at a solution I set the equation up so that y=U/mg and I get the answer 13460.7m which just seems to big to be right although I could be wrong about that.