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Physics, 22.06.2019 14:20
4r-134a enters the condenser of a residential heat pump at 800 kpa and 50°c at a rate of 0.022 kg/s and leaves at 750 kpa subcooled by 3°c. the refrigerant enters the compressor at 200 kpa superheated by 4°c determine (a) the isentropic efficiency of the compressor, (b) the rate of heat supplied to the heated room, and (c) the cop of the heat pump. also, determine (d) the cop and rate of heat supplied to the heated room if this heat pump operated on the ideal vapor-compression cycle between the pressure limits of 200 and 800 kpa. (0.757, 4.37 kw, 5.12, 6.18, 3.91 kw)
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Physics, 22.06.2019 23:30
Using a caesar cypher with an offset of three characters (a -> d, b -> e, z -> c), what would be the correct cypher text for the plain text "attack at dawn"?
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Physics, 23.06.2019 03:00
If you held a stone over the mouth of a well and then let it go , what would happen to the stone? explain your answer.
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Mathematics, 23.06.2019 23:00
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Mathematics, 23.06.2019 23:10
Mathematics, 23.06.2019 23:10
English, 23.06.2019 23:10
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Chemistry, 23.06.2019 23:10