1. Steam flowing at 50 ft/s, 200 psia, 600 F, expands to 150 psia in a converging nozzle. Find the exit velocity and area ratio Ae/Ai.
2. A convergent nozzle has a minimum area of 1 ft2 and receives air at 25 lbf/ in.2, 1800 R, flowing at 330 ft/s. What is the back pressure that will produce the maximum flow rate?