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Helium is steadily flowing through a duct. At the entrance of the duct the gas is...

Helium is steadily flowing through a duct. At the entrance of the duct the gas is at 40 psia and 120 oF, flowing at a rate of 20 ft/s as a result of a fan in the duct. At the duct exit, the helium is at 190 oF and 30 psia. The duct has a constant cross-sectional area of 0.5ft2. Calculate the following:

a. Volumetric flow rate at the inlet [ft3/min]

b. Mass flow rate [lbm/s]

c. Velocity at the exit [ft/s]

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