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While trapped in a cylinder, 2.27 kg of air is compressed isothermally (with a water jacket being used around the cylinder to maintain constant temperature) from initial conditions of 101 kPa and 16 celsius degree to a final pressure of 793 kPa. For this process, determine (a) the work required and (b) the heat removed, both in units of Kj.
consider an ideal vapor-compression refrigeration cycle. the refrigerator employs refrigerant 134a as the working fluid
air at 2900 r 435 psia enters a turbine operating at steady state and expands adiabatically to the exit where the
an insulated piston-cylinder device initially contains 0.3 m3 of carbon dioxide at 200 kpa and 27 oc. an electric
in 2001 the united states produced 51 of its electricity in the amount of 1.878 1012 kwh from coal fired power plants.
assuming that the diameters of 1000 brass plugs taken consecutively from a machine form a normal distribution with
measurements of drag force are made on a model automobile in a towing tank filled with fresh water. the model length is
the pilot of flighter plane f is following 1.5 behind the pilot of bomber b. both planes are originally traveling at
a jeep tows a 400kg block uip a 45deg incline. the coefficients of friction between the block and the ground are us0.5
a heat pump is used to heat a house and maintain it at 20 degc. on a winter day when the outdoor air temperature is -5
a thin walled tube of inner radius r1 outer radius r2 and initial temperature ti is cooled by a fluid of temperature tf
a rigid tank of volume v1 0.15m3 initially contains water at t1 50oc. the water is heated until t2 300oc and p2
an electrical wire having a diameter of 1.5 mm and covered with a plastic insulation thickness 2.5 mm is exposed to
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