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1. A compressor in a refrigerator receives R-410a at 150 kPa, -40?C and brings it up to 600 kPa, using an actual specific work of 58.65 kJ/kg in adiabatic compression. Find the specific reversible work.
2. Air flows through a constant-pressure heating device, shown in Fig. P8.27. It is heated up in a reversible process with a work input of 200 kJ/kg air flowing. The device exchanges heat with the ambient at 300 K. The air enters at 300 K, 400 kPa. Assuming constant specific heat, develop an expression for the exit temperature and solve for it by iterations.
A 6ft wide, 10ft high vertical rectangular gate has its top edge 6ft below the water level. it is hinged along its lower edge. what force, acting on the top edge, is necessary to hold the gate shut
A closed tank is filled with a liquid. The pressure at the top of the tank is less than atmospheric pressure. Which of the following accurately represents the gage pressure distribution on the surface indicated?
rom a photograph one observes that on a level section of highway 10% of the vehicles are trucks, 90% are cars, and that there are 50 vehicles per mile of highway. The trucks travel at 40 mph, and the cars at 50 mph.
A grain-size analysis for a uniform sand in a loose state indicated that the soil particle diameter corresponding to 10% passing on the grain-size distribution curve is 0.18 mm. Estimate the coefficient of permeability.
A certain gas weighs 16.0 N/m3 at a certain temperature and pressure. What are the values of its density, specific volume, and specific gravity relative to air weighing 12.0 N/m3 ?
A gray silty clay (CL) is sampled from a depth of 12.5 feet. The "moist" soil was extruded ffrom a 6-inch high brass liner with an inside diameter of 2.83 inches and weighed 777 grams.
Freight train A passes through Petticoat Junction, a node where twosingle track lines connect, at 6:50 AM, traveling at 40 MPH, with50 cars that are 70 feet nose to nose
The initial ultimate BOD after mixing of the Bergelmir Riveris 12.0 mg/L. The DO in the Bergelmir River after the wastewaterand river have mixed is at saturation. The river temperature is 10degrees celsius
Design a 2:1 rectangular duct and fan system to pull 40000 scfm of air carrying a medium-density dust through an FCD (Final Control Device) with a ?P of 6.0 in. H2O. Assume the duct system must extend 120-feet and has four 90° elbows.
The AACE developed a generic cost estimate classification matrix (Table 1 refers) to provide a guideline for the general principles of estimate classification that may be applied across a wide variety of industry
The number of teleport inquires x in a time sharing system average .2 millisecond and follows a Poisson distribution. Find the probability at least one inquiry is made during the next millisecond.
A 100 mm nozzle is bolted (with 6 bolts) to the flange of a 300 mm horizontal pipeline and discharges water into the atmosphere. Calculate the tension load on each bolt when the pressure in the pipe is 600 kPa. Neglect vertical forces.v
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