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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