Air enters an isentropic nozzle at 360 kpa, 8 m/sec and 540 k. the nozzle exit pressure is 90 kpa. calculate the temperature and velocity of the airflow at the nozzle exit using a) exact analysis (variable specific heats) b) approximate analysis (constant specific heats; assume that specific heat ratio (k) for air is 141

An electrical kettle is made out of stainless steel,weighs two pounds (when empty) with a heating element that consumes 2 kw of electricity. assuming that the water and the kettle are at the same uniform temperature at any moment of time, calculate the shortest possible time to bring 2 quarts of water from room temperature to the onset of boiling.