Physics, 14.11.2019 04:31 valerieaj113
A2.4-m-high 200-m2 house is maintained at 22°c by an air-conditioning system whose cop is 3.2. it is estimated that the kitchen, bath, and other ventilating fans of the house discharge a houseful of conditioned air once every hour. if the average outdoor temperature is 32°c, the density of air is 1.20 kg/m3, and the unit cost of electricity is $0.1/kwh, the amount of money "vented out" by the fans in 10 hours is consider the specific heat to be 1.005 kj/kg·°c.
Answers: 2
Physics, 22.06.2019 01:10
Asteam power plant operates on an ideal reheat rankine cycle between the pressure limits of 15 mpa and 10 kpa. the mass flow rate of steam through the cycle is 12 kg/s. steam enters both stages of the turbine at 500°c. if the moisture content of the steam at the exit of the low-pressure turbine is not to exceed 10 percent, determine (a) the pressure at which reheating takes place, (b) the total rate of heat input in the boiler, and (c) the thermal efficiency of the cycle. also, show the cycle on a t-s diagram with respect to the saturation lines. (2.15 mpa; 45.0 mw; 42.6%)
Answers: 3
Physics, 22.06.2019 02:30
Power can be defined as a. the distance over which work was done. b. how much work can be done in a given time. c. all the work in an given area. d. the energy required to do work.
Answers: 1
Physics, 22.06.2019 12:00
Suppose a wire with a current is pushed upward by a magnetic field. how would the wire move if the direction of the current reversed? explain your answer.
Answers: 1
A2.4-m-high 200-m2 house is maintained at 22°c by an air-conditioning system whose cop is 3.2. it is...
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