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1. A cylinder/piston contains 100 L air at 110 kPa, 25?C. The air is compressed in a reversible polytropic process to a final state of 800 kPa, 500 K. Assume the heat transfer is with the ambient at 25?C and determine the polytropic exponent n and the final volume of the air. Find the work done by the air, the heat transfer, and the total entropy generation for the process.
2. A room at 22?C is heated electrically with 1500 W to keep a steady temperature. The outside ambient is at 5?C. Find the flux of S (=Q? /T) into the room air, into the ambient, and the rate of entropy generation.
3. A mass of 3 kg nitrogen gas at 2000 K, V = C, cools with 500 W. What is dS/dt?
What is definition of the stream function? Is it a scalar or a vector? Units of the stream function? For an ideal fluid with irrotational flow motion:
Explain CBR method of pavement design with one example.
Find the magnitude of the nonzero components of stress
A 12 ft x 12 ft square area carrying a uniform load of 5000 lb/ft^2 s applied to the ground surface. Find the vertical stress increment due to the load at a depth of 25 ft below the center of the loaded area.
Stripping overburden in the Illinois coal belt, the Dusty Coal Company uses 270-horsepower, track-type tractors (with direct-drive transmissions) and drawn scrapers. The overburden is a very soft loam that weighs 2,800 lb/yd (loose). Estimated RR fac..
Alkaloids are chemical compounds containing nitrogen that can be produced by plant cells. In an experiment, an insulated closed vessel 1.673 m3 in volume was injected with a dilute water solution containing two alkaloids: ajmalicine and serpentine..
Plot the following void ratio versus pressure data, and evaluate the compression index and the recompression index. Determine the preconsolidation stress.
Design a hollow steel shaft with an inside diameter 1/3 that of the outside diameter. The shaft transmits 200 kW at a speed of 20 Hz. The allowable shearing stress is 55 MPa, and the allowable angle of twist is 1 degree per meter of length.
a sewage treatment works stw with 4 single-stage trickling filters has become organically overloaded due to the
Liquid water is to be pumped by a 10-kW pump from 100 kPa at a rate 5 kg/s. What is the highest pressure the water can reach at the exit? Neglect the kinetic and potential energy change of the water. Take the specific volume of water as constant at 0..
The country town with service area of 150 ha is sewered, and the main outfall sewer is laid on a grade (slope) of 0.003 m/m to a treatment plant. Effluent from the treatment plant is at present discharged via an open channel to the river.
Prepare a metes-and-bounds description for the parcel shown in the accompanying figure. Assume all corners are marked with 1-in.-diameter steel rods, and a 20-ft meander line setback from Indian Lake.
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