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An ordinary vapor compression cycle using propane operates at temperatures of 240 K in the cold heat exchanger, and 280 K in the hot heat exchanger. How much work is required per kg of propane circulated in the compressor is 80% efficient? What cooling capacity is provided per kg or propane circulated?
a belt pulley is fastened to a 75 mm shaft running at 360 rpm by means of a key 18 mm wide and 125 mm long. the
optimus prime is flying straight up at 67 ms when he accidentally drops his mega-ray blaster and it falls 76 m to the
a hollow stainless steel sphere is 2.0 cm inner diameter and 5 cm outer diameter. a heater of 5w is sealed inside the
hydrogen h2 at 2.28 atm and 400 degrees f enters an insulated turbine operating at steady state and expands to 1 atm.
saturated r-134a at 310 k flows through a 30-mm-diameter .8-m-long tube. the tube wall temperature is maintained at 290
a piston-cylinder device contains 0.15kg of air initially at 2mpa and 350oc. the air is first expanded isothermally to
Determine the velocity of the airplane required for pilot to experience weightlessness at the top of the circular path.
a pulley of 100 mm diam drives one of 200mm diam by means of a belt. if the angular velocity of the drive pulley is 65
create a presentation that takes you 12 mins to 14 mins to explain the topic iskosher and halal versus genetically
the centerboard of a sailboat is 2.5m long and has a chord of 1m. approximate the centerboard as a flat plate in water
Outdoor air leaks into a building through cracks in the walls at the rate of 700 m3/h (this is infiltratation). The outside air is at a temperature of -16.1C and a humidity ratio of 0.001 kgv/kga. The density of the outside air is1.4 kg/m3. The indoo..
a thin flat pate that is 0.2m by 0.2m on a side is oriented parallel to an atmospheric airstream having a velocity of
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