4-Steam flows through a device with a stagnation pressure of 120 psia, a stagnation temperature of 7008F, and a velocity of 900 ft/s. Assuming ideal- gas behavior, determine the static pressure and temperature of the steam at this state.

Helium enters a nozzle at 0.5 MPa, 600 K, and a velocity of 120 m/s. Assuming isentropic flow, determine the pressure and temperature of helium at a location where the velocity equals the speed of sound. What is the ratio of the area at this location to the entrance area?

I need the answer as soon as possible

3. An air stream, which is traveling at a Mach number of 1.8, undergoes a normal shock wave. The stagnation pressure and temperature before the normal shock wave are 150 kPa and 350 K, respectively. Determine a) the temperature and the pressure after the normal shock wave, b) the Mach number and the velocity after the normal shock wave and c) the stagnation temperature and pressure after the shock wave and d) the entropy change across the normal shock wave (Ans. a) 325.4 K, 94.3 kPa, b) 0.6165, 223 m/s, c) 350 K, 122.2 kPa, d) 59.55 J/kgK)