Physics, 17.07.2019 21:10 erniewernie
Aheat pump using refrigerant-134a heats a house by using underground water at 8°c as the heat source. the house is losing heat at a rate of 64000 kj/h. the refrigerant enters the compressor at 240 kpa and 0°c and leaves at 1.4 mpa and 80°c. the refrigerant exits the condenser at 34°c.
a.)determine the power input to the heat pump. kw
b.)determine the rate of heat absorption from the water. kw
c.)determine the increase in electric power input if an electric resistance heater is used instead of a heat pump. kw
Answers: 3
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An electron is trapped at a defect in a crystal. the defect may be modeled as a one-dimensional, rigid-walled box of width 1.00 nm. (a) sketch the wavefunctions and probability densities for the n 1 and n 2 states. (b) for the n 1 state, nd the probability of nding the electron between x1 0.15 nm and x2 0.35 nm, where x 0 is the left side of the box. (c) repeat (b) for the n 2 state. (d) calculate the energies in electron volts of the n 1 and n 2 states
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Aheat pump using refrigerant-134a heats a house by using underground water at 8°c as the heat source...
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