![Physics](/tpl/images/cats/fizika.png)
![answer](/tpl/images/cats/otvet.png)
Answers: 2
Other questions on the subject: Physics
![image](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 03:00, ambercuevas2707
An internally reversible refrigerator has a modified coefficient of performance accounting for realistic heat transfer processes of where qin is the refrigerator cooling rate, qout is the heat rejection rate, and is the power input. show that copm can be expressed in terms of the reservoir temperatures tc and th, the cold and hot thermal resistances rt, c and rt, h, and qin, as where rtot rt, c rt, h. also, show that the power input may be expressed as 1.39 a household refrigerator operates with cold- and hot-temperature reservoirs of tc 5 c and th 25 c, respectively. when new, the cold and hot side resistances are rc, n 0.05 k/w and rh, n 0.04 k/w, respectively. over time, dust accumulates on the refrigerator’s condenser coil, which is located behind the refrigerator, increasing the hot side resistance to rh, d 0.1 k/w. it is desired to have a refrigerator cooling rate of qin 750 w. using the results of problem 1.38, determine the modified coefficient of performance and the required power input w under (a) clean and (b) dusty coil conditions. internally reversible refrigerator qout qin w high-temperature reservoir low-temperature reservoir th th, i tc, i tc high-temperature side resistance low-temperature side resistance w qin th tc qinrtot tc qinrtot copm tc qinrtot th tc
Answers: 2
![image](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 13:40, youngbeauty17
Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?
Answers: 1
![image](/tpl/images/cats/fizika.png)
Physics, 23.06.2019 02:00, temperent6049
How does the strength of the electrostatic force between an electron and a proton compare to the strength of the gravitational force between them?
Answers: 1
![image](/tpl/images/cats/fizika.png)
Physics, 23.06.2019 02:30, shahrukhafridi2668
What instrument is used to measure liquid volume?
Answers: 1
Do you know the correct answer?
An electric-discharge or LED luminaire or listed assembly can be cord connected if located the outl...
Questions in other subjects:
![Konu](/tpl/images/cats/himiya.png)
Chemistry, 19.11.2020 03:30
![Konu](/tpl/images/cats/mat.png)
Mathematics, 19.11.2020 03:30
![Konu](/tpl/images/cats/mat.png)
![Konu](/tpl/images/cats/mat.png)
Mathematics, 19.11.2020 03:30
![Konu](/tpl/images/cats/mat.png)
Mathematics, 19.11.2020 03:30
![Konu](/tpl/images/cats/en.png)
English, 19.11.2020 03:30
![Konu](/tpl/images/cats/mat.png)
![Konu](/tpl/images/cats/biologiya.png)
![Konu](/tpl/images/cats/mat.png)