![subject](/tpl/images/cats/User.png)
Engineering, 25.01.2020 06:31 jhernandezvaldez142
Aheat pump with a cop of 3.2 is used to heat a perfectly sealed house (no air leaks). the entire mass within the house (air, furniture, etc.) is equivalent to 1200 kg of air. when running, the heat pump consumes electric power at a rate of 5 kw. the temperature of the house was 7∘c when the heat pump was turned on. if heat transfer through the envelope of the house (walls, roof, etc.) is negligible, the length of time the heat pump must run to raise the temperature of the entire contents of the house to 22∘c is a. 13.5 min b. 43.1 min c. 138 min d. 18.8 min e. 808 min
![ansver](/tpl/images/cats/User.png)
Answers: 2
Another question on Engineering
![question](/tpl/images/cats/User.png)
Engineering, 03.07.2019 15:10
Ahouse has the following electrical appliance usage (1) single 40w lamp used for 4 hours per day (2) single 60w fan used for 12 hours per day (3) single 200w refrigerator that runs 24 hours per day with compressor run 12 hours and off 12 hours find the solar power inverter size in watt with correction factor of 1.25.
Answers: 1
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:10
Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.
Answers: 1
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:10
An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature
Answers: 2
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:10
You are making beer. the first step is filling the glass carboy with the liquid wort. the internal diameter of the carboy is 15 in., and you wish to fill it up to a depth of 2 ft. if your wort is drawn from the kettle using a siphon process that flows at 3 gpm, how long will it take to fill?
Answers: 1
You know the right answer?
Aheat pump with a cop of 3.2 is used to heat a perfectly sealed house (no air leaks). the entire mas...
Questions
![question](/tpl/images/cats/biologiya.png)
Biology, 07.07.2019 18:00
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 07.07.2019 18:00
![question](/tpl/images/cats/mat.png)
Mathematics, 07.07.2019 18:00
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 07.07.2019 18:00
![question](/tpl/images/cats/mat.png)
Mathematics, 07.07.2019 18:00
![question](/tpl/images/cats/mat.png)
Mathematics, 07.07.2019 18:00
![question](/tpl/images/cats/mkx.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 07.07.2019 18:00
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/geografiya.png)
Geography, 07.07.2019 18:00
![question](/tpl/images/cats/istoriya.png)
History, 07.07.2019 18:00
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 07.07.2019 18:00
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 07.07.2019 18:00
![question](/tpl/images/cats/istoriya.png)
History, 07.07.2019 18:00