At steady state, air at 200 kPa, 330 K, and mass flow rate of0.5 kg/s enters an insulated duct having differing inlet and exitcross-sectional areas. The inlet cross-sectional area is 6cm2. At the duct exit, the pressure of the air is 100kPa and the velocity is 250 m/s.
Neglecting potential energy effects and modeling air as an idealgas with constant cp = 1.008 kJ/kg · K,determine:
(a) the velocity of the air at the inlet, in m/s.
(b) the temperature of the air at the exit, in K.
(c) the exit cross-sectional area, in cm2.
