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1. A flow of saturated liquid R-410a at 200 kPa in an evaporator is brought to a state of superheated vapor at 200 kPa, 20?C. Assuming the process is reversible, find the specific heat transfer and specific work.
2. A flow of R-410a at 2000 kPa, 40?C in an isothermal expander is brought to a state of 1000 kPa in a reversible process. Find the specific heat transfer and work.
3. A coflowing heat exchanger has one line with 2 kg/s saturated water vapor at 100 kPa entering. The other line is 1 kg/s air at 200 kPa, 1200 K. The heat exchanger is very long, so the two flows exit at the same temperature. Find the exit temperature by trial and error. Calculate the rate of entropy generation.
The portable floor crane in the automotive shop is lifting a 420 lb engine. For the position compute the magnitude of the force supported by the pin at C and the oil pressure p against the 2.70 in. diameter piston of the hydraulic cylinder unit AB..
Program developed by the United States Department of Energy (DOE) and the United States Environmental Protection Agency (EPA) to help reduce the amount of electricity used by computers and related devices
The vehicle has a frontal cross -sectional area of 1.9 m^2. The roadway has a straight alignment and a badly patched and broken asphalt surface. assume a drag coefficient of 0.3 and p of air of 1.29 kg/m^3
A flume discharges 42.0 cfs on a slope of 0.50 ft in 1000 ft. The section is rectangular, and Manning's roughness coefficient is 0.012. Determine the best hydraulic section, i.e., the dimension for minimum wetted perimeter.
Briefly describe electron and hole motions in a p-n junction for forward and reverse biases;
A .90% Carbon hypereutectoid plain carbon steel is slowly cooled from 900 degrees C to just slighty above 723 degrees C calculate the weight percent proeutectoid cementite and weight percent austenite present in the steel.
Determine the forces in the members for the pinned jointed frame shown in Figure Question 1, using the method of virtual work. All members have the same EA.
Characteristic values of the shear strength parameters of the soil are c'= 0, and f' = 400. Determine the required width of the footing if a factor of safety of 3.0 against shear failure is specified when the water table rise to foundation level.
The ordinate of a5-hr unit hydrograph of a basin is determined equal to 300 cfs at atime 4 hours after the beginning of net rainfall. What would be therunoff rate after 4 hours if a storm of uniform intensity
The pressure on the back side is negative; its magnitude is 0.5 times the (negative) stagnation pressure on the back side. Determine the drag coefficient for the sign type
Potential Research on Warm-mix Asphalt Concrete
A direct shear test is performed on a saturated specimen of loose sand. A normal stress equal to 100 kPa is applied and a maximum shear stress of 75 kPa is measured in the shear test. Determine the principal stresses and the orientation of these p..
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