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1. An air compressor receives air at 290 K, 100 kPa and brings it up to a higher pressure in an adiabatic process. The actual specific work is 210 kJ/kg, and the isentropic efficiency is 82%. Find the exit pressure and the second-law efficiency.
2. A flow of 2 kg/s water at 1000 kPa, 80?C goes into a constant-pressure boiler, where the water is heated to 400?C. Assume the hot gas that heats the water is air coming in at 1200 K and leaving at 900 K, as in a counter flowing heat exchanger. Find the total rate of irreversibility in the process and the second-law efficiency of the boiler setup.
A chemical is added at the beginning of a water treatment plant at a dose of 750 lb/day. The water treatment plant provides water to a community of 200,000 people and the average water consumption in the city is 110 gallons per capita per day (gpcd).
A gate having the cross section is 4 ft wid and is hinged at C. The gate weighs 18,000 lb, and its mass center is 1.67 ft to the right of the plane BC. Determine the vertical reaction at A on the gate when the water level is 3 ft above the base.
In the construction management, there is a lot of procurement route that are necessary and suitable for the construction industry.
Is it possible (in this part of the world) for the sun to ever shine directly upon the OUTSIDE of a NORTH-facing wall of a home or other building? If so when?
A thin-walled circular tube has an average diameter of 100 mm and a wall thickness of 4 mm. It is subject to torque of 4 kNm and a compressive axial force of 40 kN.
A baseball is hit from home plate and travels over the center field fence. What would the trajectory of the baseball look like if air-resistance was not factored in
A car travels along a horizontal circular curved road that has aradius of 600 m. If the speed is uniformly increased at a rate of2000 km/ h2 , determine the magnitude of theacceleration at the instant the speed of the car is 60 km/h.
A pipe is to be installed under the ground on a bed of aggregate 6 in. thick. The entire weight on the aggregate from pipe and soil above the pipe is 1800 lbs. per linear foot of pipe. What is the pressure on the soil if theta is 45 degrees? Assum..
Process of designing a stormwater management system to handle the runoff from this area, and have selected the following 1-h storm as the basis of your design.
Compute the bearings for Great Plain Avenue and Colby Street), polylines, blocks for the direction arrows and the "H's" in the parking area.
determine the moment about O due to the weight of the motor-fan unit AB, whose weight of 40 N acts at G.
Consider a high-rate sedimentation basin with tube settlers. The basin is 120 feet long and 30 feet wide. The length of the basin covered by tube settlers is 90 feet.
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