4) Hot combustion gases enter the nozzle of a turbojet engine at 350 kPa, 1007 °C and 95 m/s, and they exit at a pressure 100 kPa. Assuming an isentropic efficiency of 95 percent and treating the combustion gases as air determind a- The exit velocity b- The exit temperature

A driver applies the brakes on 1,000 kg automobile to stop from a speed of V = (70 + y/2) km/hr. Find the entropy generation assuming an ambient temperature of Tamb = 20oC:                                                                                                 DS = _______ kJ/K (+ 1%) y=95

! Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Five kilograms of air at 427°C and 600 kPa are contained in a piston-cylinder device. The air expands adiabatically until the pressure is 100 kPa and produces 450 kJ of work output. Assume air has constant specific heats evaluated at 300 K. Determine the entropy change of the air in kJ/kg-K. Use the table containing the ideal gas specific heats of various common gases. (You must provide an answer before moving on to the next part.) The entropy change of the air is kJ/kg-K.