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1. A trapezoidal channel with a bottom width of 4.00 feet and side slopes of 2 horizontal to 1 vertical conveys a discharge of 300 cfs. If the depth of flow is 2.25 feet, what is the Froude number? Is the flow subcritical or supercritical?
2. A trapezoidal channel with a bottom width of 10.0 feet and side slopes of 2 horizontal to 1 vertical conveys a discharge of 450 cfs. If the depth of flow is 2.50 feet, what is the Froude number? Is the flow subcritical or supercritical?
A general aviation aircraft has a propeller with 75 inches diameter that rotates at 2300 rpm (revolution per minute). Find the Mach number at the tip when the aircraft is standing on the ground ready to take off.
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A metal plate (k = 180 w/(m*k), p = 2800 kg/m^3, cp = 880 J/(kg*k)) with a thickness of 1 cm is being cooled by air at 5 degrees C with a convection heat transfer coefficient of 30 w/(m*k). If the initial temperature of the plate is 300 degrees C, de..
Air enters the evaporator section of an air-conditioner at 100 kPa, 27oC with a volumetric flow rate of 6 m3 /min. R-134a enters the evaporator at 120 kPa with a quality of 0.3 and rate of 2 kg/min and it leaves as a saturated vapor at the same press..
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