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A refrigeration cycle maintains a clean room at 68o F by removing energy entering the room by heat transfer at the rate of 0.21 Btu/s. The cycle rejects energy by heat transfer to the outdoors where the temperature is 80o F. Assume steady state operation. (a) If the rate at which the cycle rejects energy by heat transfer to the outdoors is 0.24 Btu/s, determine the power required, in Btu/s. (b) Determine the power required for a reversible refrigeration cycle operating between cold and hot reservoirs at 68o F and 80o F, respectively, and the corresponding rate at which energy is rejected by heat transfer to the outdoors, each in Btu/s. (with sketch)
an experimental fireworks shell is launched vertically from point a with an initial velocity of magnitude v0 140
Cortical bone gets weaker with aging, but it turns out that diaphyseal diameters can also change with aging, particularly in males, such that the safety factor of the diaphysis is approximately constant with aging.
Estimate the Schmid Factor, which is used to convert the CRSS into a critical tensile 'yield' stress. Use the measured angle between the slip trace and the sample long axis
twenty pounds of a gas mixture is contained in a tank with volume 30 cubic feet at 30 psia and 70 f. the gas mixture
0.11 kg of Argon in a piston-cylinder is compressed poly tropically from 1atm and 0°C to 10atm and 165°C. Determine the work done during the process.
a steam turbine has an inlet pressure of 1200 kpa and temperature of 400 degc. the steam exits the turbine at a
A truck (T) is tied to a car (C), back bumper to back bumper. To you, the viewer, the truck is on the left, and the car is on the right (side view). Both vehicles are at rest. The rope connecting the two is initially slacked. The truck takes off, and..
superheated steam at 500 celsius and 3 mpa enters a steady state turbine with a mass flow rate of 500 kgs. the steam
consider a rankine cycle operating in an ideal reheat mode where the high pressure turbine receives steam at 8mpa and
Air from a workspace enters the air conditioner unit at 30C dry bulb and 20C wet bulb. The air leaves the air conditioner and returns to the space at 20C dry bulb and 6.5C dew point temperature. If there is any, the condensate leaves the air conditio..
A house is maintained at 1 atm and 24 C and warm air inside a house is forced to leave the house at a rate of 150 m^3/h as a result of outdoor air at 5C infiltrating into the house through the cracks. Determine the rate of net energy loss of th..
propane gas enters a continuous adiabatic heat exchanger at 40degc and 250 kpa and exits at 240degc superheated steam
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