Okay so i have a project, and this is pretty basic physics but i'm kind of confused. so for those of you how a turbo work, please help me out here. okay so: pV = nKT in thermodynamics. so in a turbo, as air enters the compressor turbine, n and k stay constant correct? however as air enters the system, volume decreases when it enters the turbine, and as a result pressure increases. however, since volume decreases, shouldn't temperature increase since there is less space and thus molecules collide more? i don't understand it, because in the equation pv=nkt, if n and k are constant, then an increase in pressure or an increase in volume should mean an increase in temperature. doesn't make sense, can someone clarify that? also i was wondering why, when pressure of the air increases, density of the air increases as well, is there an equation? for example like 15 psi is less dense than 20 psi of boost. why is that? (if you think your helping me too much, is there a name for it?) thanks!