Air enters an adiabatic nozzle steadily at 300 kPa, 200 °C, and 30 m/s and leaves at 100 kPa and 180 m/s. The inlet area of the nozzle is 80 cm2. Determine

(a) the mass flow rate through the nozzle,
(b) the exit temperature of the air, and
(c) the exit area of the nozzle.(Note: The average specific heat of air is .)

Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.