# Statistical Physics?

1. Mar 4, 2008

### j93

1. The problem statement, all variables and given/known data
A space ship that is cylindrical of area A and Length L decelerates at a constant rate a. The air treated. What is the difference in pressure due to the motion from the front to the back of the ship. The acceleration is parallel to L and air was in thermal equilibrium.

2. Relevant equations

3. The attempt at a solution
I believe intuitively there should be a factor $$e^{E/kT}$$ where $$E=W=Fx=max$$. I think I might need to calculate the partition function but it might not be necessary like when calculating $$V_{rms}$$ in passive circuit.

Last edited: Mar 4, 2008
2. Mar 5, 2008

### genneth

Your feeling is correct. Just remember that the density of the air will also scale that way, but you need to conserve mass/number.

3. Mar 5, 2008

### Lojzek

Do you need statistical physics here? Why not use dp=ro*g*dh?