Steam at 300 psia and 700 F enters a nozzle under steady conditions. The mass flow rate is 10 lbm/s. Steam leaves the nozzle at 200 psia with a velocity of 900 ft/s. The nozzle loses heat at the rate of 1.2 BTU per pound of steam flow. Determine the a) Inlet Velocity (inlet area

Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.