Air with a mass flow rate of 2.3 kg/s enters a horizontal nozzle operating at steady state at 420 k, 350 kpa, and velocity of 3 m/s. at the exit, the temperature is 300 k and the velocity is 460 m/s. using the ideal gas model for air with constant ep=1.011 k/kg. k, determine: (a) the area at the inlet, in m2 (b) the heat transfer to the nozzle from its surroundings, in kw.

Aseries piping system conveys methyl alcohol. the system consists of 70 m of 1- nominal pipe follow by 50 m of 2-nominal pipe, both schedule 40 commercial steel. the 1-nominal pipe contains 3 90° elbows (regular) anda fully open gate valve, all threaded. the pressure drop through the system is 150 kpa. determine the volume flow rate through the system that is horizontally laid.