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4 19 WP At steady state air at 200 kPa 325 K and mass flow...

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4 19 WP At steady state air at 200 kPa 325 K and mass flow rate of 0 5 kg s enters an insulated duct having differing inlet and exit cross sectional areas The inlet cross sectional area is 6 cm At the duct exit the pressure of the air is 100 kPa and the velocity is 250 m s Neglecting potential energy effects and modeling air as an ideal gas 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 cm

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