Just curious, but I was wondering if anyone knew how to find the maximum temperature of the surface of a shuttle/satellite upon reentering the atmosphere? My guess would be: F=-cv^2 [itex]E = \int F dx = \int -cv^2 dx[/itex] PV=nRT --- I think PV has units of joules, maybe not, but assuming it is, so I'd say [itex]\Delta[/itex]E=nR[itex]\Delta[/itex]T But what would n be here? it's usually the moles of gas... so maybe dE/dt=dn/dt*R[itex]\Delta[/itex]T ? dn/dt would be some function of the velocity and the density of the atmosphere... I don't know, I'll just stop here for now lol. what do you guys think?