Chapter $4-$ Part I $($Moving Normal Shock$)$

Question $5$:

A normal shock is traveling into still air $(14\mathrm{.}7$ psia and $520$ R $)$ at a velocity of $1800f\frac{t}{sec}.$

$($a$)$ Determine the temperature, pressure, and velocity that exist after passage of the shock wave.

$($b$)$ What is the entropy change experienced by the air?

Question $6$:

A closed tube contains nitrogen at $20C$ and a pressure of $1{10}^4\frac{N}{m^2}($Figure P$7\mathrm{.}5).$ A shock wave progresses through the tube at a speed of $380\frac{m}{s}.$

$($a$)$ Calculate the conditions that exist immediately after the shock wave passes a given point. $($The fact that this is inside a tube should not bother you, as it is merely a normal shock moving into a gas at rest.$)$

$($b$)$ When the shock wave hits the end wall, it is reflected back. What are the temperature and pressure of the gas between the wall and the reflected shock? At what speed is the reflected shock traveling? $($This is just like the sudden closing of a valve in a duct.$)$