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A new jet engine is being tested in a wind tunnel, as illustrated in the following figure. Air, with standard properties at an altitude of 6000 m, enters the engine at a velocity of 275 m/s through a circular intake port of radius 0.5 m. Fuel enters the engine at a mass flowrate of 2.5 kg/s. If the exhaust gas leaves the engine with an average velocity of 300 m/s through an exit port of radius 0.4 m, calculate the density of the exhaust gas. How would your solution to this problem change if the engine were attached to the wing of an airplane flying through still air at a velocity of 900 km/h?
Considering both radiation and convection heat transfer, determine the outer surface temperature and the rate of heat transfer though the roof.
Refer to Figure 13.14 (site grading plan). A grade stake was set near the middle of Lot #26, and the stake-top elevation was determined to be 84.15 m. Compute the cut and fill at each lot corner.
An electrodialysis is used to treat a stream of 125 m3/d produced water with a salinity of 13,000 mg/L NaCl before the produced water is discharged to the river with the flow rate of 5 million L/d and salinity of 20 mg/L NaCl.
The beams support one-way slabs, 6 inches thick that span 20 feet center to center. Assume that the beams are 16 inches wide and 24 inches deep. Determine the dead load in pounds per linear foot for the beams, from the concrete structure alone.
Determine the largest screw spacing for the pi-shaped beams that allows the beams to carry an ultimate shear load of V = 2000 lbs. Each screw can support 350 lbs.
Compute the amount of chlorine required for disinfection in pounds per day(lb/d). Estimate the annual cost for disinfection using chlorine. Flow Rate= 30 milloin gallons per day.
Find a recurrence relation for the number of ways to go n miles by fast walking at 2 miles per hour or jogging at 4 miles per hour or running at 8 miles per hour; at the end of each hour a choice is made of how to go the next hour.
a regular hexagonal pyramid has an upper base edge of 16 ft. and a lower base edge of 28 ft. if the volume of the frustum is 18041 ft^3., find the lateral area of the frustum.
Conditions at each point are (C indicates the concen-tration of carbon monoxide, CO):
. It suffices to write all terms in the appropriate powers of the Laplace transform variable s and then carry out the matrix operations to determine the order of the determinant.
An ocean outfall diffuser that discharges treated wastewater into the Atlantic Ocean is 5,000 m from a public beach. The wastewater contains 10^5 coliform bacteria per milliliter.
You add 100 mg/L of glucose to pure water, then decide that this was a mistake and decide to remove it biochemically before you serve the water to your friends at a cocktail party. To remove the glucose, you seed the water with a harmless bacteria..
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