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1. The compressor in a refrigerator takes refrigerant R-134a in at 15 lbf/ in.2, 0 F and compresses it to 125 lbf/ in.2, 100 F. With the room at 70 F, find the reversible heat transfer and the minimum compressor work.
2. A compressor in a refrigerator receives R-410a at 20 psia, -40 F and it brings it up to 100 psia, using actual specific work of 23.48 Btu/lbm in an adiabatic compression. Find the specific reversible work.
Two m^3 of xenon(Xe) are contained in a closed rigid tank at 70 degree C and 2 bar. The tank is heated to a pressure of 10 bar. Assuming that Xe behaves like an ideal gas with a specific heat ration of 1.7
A certain gas has a molecular mass of 40. It is under a pressure of 2.5atm and a temperatature of 25 Degree Celsius. Determine its density and pressure in CGS absolute units.
One kilogram of water at 300?C expands against a piston in a cylinder until it reaches ambient pressure, 100 kPa, at which point the water has a quality of 90.2%. It may be assumed that the expansion is reversible and adiabatic. What was the initi..
A completely mixed retention basin is used to treat an industrial waste water consisting of a non-conservative pollutant, using a reaction that destroys the pollutant according to first-order reaction kinetics, with k = 0.216/day.
If a logit model is estimated with coefficients of -0.543 for distance and 0.0165 for commercial space (in 1000 of ft^2), how many shopping trips will be made to each of the four shopping centers?
To protect the channel from erosion, the normal flow velocity for the design discharge has to be reduced to 7.0 fps or below, and the flow Froude number must be reduced to 0.80 or below.
Ecocity has two potential sources of water supply: groundwater and a small river fed by a mountain spring. The river supports a lot of fish and other wildlife, so the citizens do not want to use any more of it than necessary. Unfortunately, however, ..
Two pumping wells, A and B, are 100m apart. They each completely penetrate a homogeneous, confined aquifer, and pump at exactly the same rate, 5m^3/day. Prior to pumping
The following data apply to a closed link traverse. Compute preliminary azimuths, adjust them. and calculate departures and latitudes, misclosures in departure and latitude, and traverse relative precision.
calculate departures and latitudes, misclosures in departures and latitude, and traverse relative precision. Balance the departures and latitude using the compass rule, and calculate coordinates of points B, C, and D.
The road has 12-ft lanes. Due toexpensive excavation, it is determined that a maximumof 34 ft can be cleared from the road's centerline toward the inside lane to provide for stopping sight distance.
The 3.0-ft diameter piper is 3,400 feet long with a steady flow rate of 10,000 gal/minozone (in mg/L) should be Injected at the head of the piper so what there will be an ozone concentration of 1.0mg/L
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