Aheat pump provides 65,000 btu/h of heat to a dwelling at 70 °f when the outside temperature and the evaporator temperature is 0 °f the device operates on a dry compression cycle and uses r-12 as the working fluid. assuming that the condenser outlet temperature is 10 °f above the room temperature and the evaporator temperature is 10 °f below the outside temperature. determine (a) the flowrate of the refrigerant, (b) the cop, and (c) the power required for the compressor. where mdot= 0.287 lbm/s, cop=4.9 and pc=3872w
Answers: 2
Physics, 21.06.2019 20:30
When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false
Answers: 1
Physics, 21.06.2019 22:00
Animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. reactivate d) a dog is getting hot in the sunlight, so he moves to a shaded area.
Answers: 2
Physics, 21.06.2019 22:30
Acricket ball of 70g moving with a velocity of 0.5 m/s is stopped by a player in 0.5s what is the force applied to stop the ball
Answers: 1
Physics, 22.06.2019 06:30
Which of these statements is true? a. quarks pair with leptons to form protons and neutrons. b. quarks pair with bosons to form photons. c. quarks pair with photons to form protons and neutrons. d. quarks pair with other quarks to form protons and neutrons. e. quarks pair with electrons to form protons.
Answers: 1
Aheat pump provides 65,000 btu/h of heat to a dwelling at 70 °f when the outside temperature and the...
Mathematics, 26.03.2020 22:00
History, 26.03.2020 22:00
Mathematics, 26.03.2020 22:00
Mathematics, 26.03.2020 22:00
English, 26.03.2020 22:00