1.      Air enters aconverging-diverging nozzle with a total pressure of 1100 kPa and atotal temperature of 127°C.  The exit area to throat arearatio is 1.8.  The throat area is 5cm2.  The velocity at the throat is sonic andthe diverging section acts as a nozzle.  Determine thefollowing:
a.       The mass flowrate
b.      The exit pressure andtemperature
c.       The exit Machnumber
d.      The exit velocity
2.      The converging-divergingnozzle now has a throat area of 100 mm2 and an exit areaof 160 mm2. The inlet flow is helium at a total pressureof 1 MPa and total temperature of 102°C. Determine the backpressure that will give sonic condition at the throat, but subsoniceverywhere else.
