tube. How much time will elapse from the initial acceleration of the piston to the intersection of the two shocks? 5.5 Air (y = 1.4, R = 287 J/kg K) at 100 kPa and 290 K is flowing in a constant-area tube with a velocity of 100 m/s. (See Figure P5.5.) Suddenly, the end of the tube is closed, which causes a normal shock to propagate back through the airstream. Find the absolute velocity of this shock. 분산시키다 V = 100 m/s S Figure P5.5