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Refrigerant 134a enters a compressor operating at steady state as saturated vapor at -8 degress celcius and exits at a pressure of 12 bar. The isentropic compressor efficiency is 70%. Heat transfer between the compressor and its surroundings can be ignored. Kinetic and potential energy effects are also neligible. Determine the exit temperature in degrees celcius and the work input (-Wcv/m), in kJ/kg of refrigerant flowing.
the boy at a attempts to throw a ball over the roof of a barn with an initial speed of va18 ms. determine the
determine the energy loss that will occur if water flows with a velocity of 7fts through a gate vlave fully open. what
what are the four basic families of shape-production processes? Cite one advantage and one limitation of each family.
atmospheric air at 10 psia and 70 f dry bulb has a relative humidity of 50. if the air is sensibly heated at a
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the silver medal awarded to the second place winner in 2002 salt lake city winter olympics had a composition of 92.5 at
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Determine the rate of heat transfer to the mid-stage cold head and determine the rate of heat transfer to the cold head
a cylinder is fitted with a frictionless piston contains 10 lbm of r-134a at 100 psia 300 f. the system is cooled at
a rectactangular surface is placed in a vertical position in fresh water with its top and bottom edges horizontal. if
a horizontal axisymmetric jet of air with 10 mm diameter strikes a stationary vertical disk of 200 mm diameter. the jet
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