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Refrigerant-134a enters the condenser of a residential heat pump at 800 kPa and 35 degrees C at a rate of 0.018 kg/s and leaves at 800 kPa as a saturated liquid. If the compressor consumes 1.2 kW of power, determine (a) the COP of the heat pump and (b) the rate of heat absorption from the outside air.
steam is the working fluid in an ideal reheat rankine cycle. steam enters the first-stage turbine at 8.0 mpa 480oc and
estimate the activation energy for creep for the low carbon nickel alloy using the following temperature dependence of
which acitivities does hydraulic analysis of a pipeline include using HYSYS software? what data can obtained?
At a section in a passage, the pressure is 150 kPa (abs), the temperature is 10 deg C, and the speed is 120 m/s. For isentropic flow of air, determine the Mach number at the point where the pressure is 50 kPa (abs). Sketch the passage shape.
Calculate the concentration (in weight percent) of molybdenum that must be added to tungsten to yield an alloy that contains 1.51 x 1022 Mo atoms per cubic centimeter.
some engineers have suggested that air compressed into tanks can be used to propel personal transportation vehicles.
a force f 12t where t is in seconds is applied to a 2kg box at rest on a horizontal surface uk .3 for 5 seconds.
consider one kmol of methane at a pressure of 23.2 bar and a temperature of 200 k.a is this methane an ideal gas? show
At what location s will the combined moment of the weights of the man and platform about point B be zero?
consider a carnot-cycle refrigerator with ammonia as the working fluid. heat is rejected from the ammonia at 20 deg c
a garden hose attached with a nozzle is used to fill a 20-gal bucket. the inner diameter of the hose is 1 inch and it
the annual growth rate of energy utilization in the world was 2.5 per year in 2011. how long would it take to consume
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