Designing an energy attenuation system that controls the 1200 kg car traveling at 100 km/hr at impact. Compare to design an energy attenuation system that controls the energy of a car at a fast speed.

Steam enters a converging nozzle at 3.0 mpa and 500°c with a at 1.8 mpa. for a nozzle exit area of 32 cm2, determine the exit velocity, mass flow rate, and exit mach number if the nozzle: negligible velocity, and it exits (a) is isentropic (b) has an efficiency of 94 percent