Please make sure to explain the physics behind it. Thanks! Problem 9.

I need help plotting 10 curves for pressure along with velocity and density analysis. Please make sure to explain the physics behind it. Thanks!

Problem 9.41

Air, with a stagnation pressure of 100 kPa, flows through the nozzle in Fig. P9.41, which is 2 m long and has an area variation approximated by A = 20-20x+10x^2 with A in cm2 and x in m. It is desired to plot the complete family of isentropic pressures p(x) in this nozzle, for the range of inlet pressures 1 < p(0) <100 kPa. Indicate which inlet pressures are not physically possible and discuss briefly. If your computer has an online graphics routine, plot at least 10 pressure profiles; otherwise just hit the highlights and explain