subject
Physics, 15.11.2019 18:31 pippalotta

Aheat pump is a heat enginer run in reverse. in winter it pumps heat from the cold air outside into the warmer air inside the building, maintaining the building at a comfortable temperature. in summer it pumps heat from the cooler air inside the building to the warmer air outside, acting as an air conditioner.(a) if the outside temperature in winter is -5.0 degrees c and the inside temperature is 17.0 degrees c, how many joules of heat will the deat pump deliver to the inside for each joule of electrical energy used to run the unit, assuming an idel carnot cycle? (b) suppose you have the option of using electrical resistance heating rather than a heat pump. how much electrical energy would you need in order to deliver the same amount of heat to the inside of the house as in part (a)? consider a carnot heat pump delivering heat to the inside of a house to maintain it at 68 degrees f. showe that the heat pump delivers less heat for each joule of electrical energy used to operate the unt as the outside temperature decreases. notice that this behavior is opposite to the dependence of the efficiency of a carnot heat engine on the difference in the reservoir temperatures. explain why this is so. c) consider a carnot heat pump delivering heat to the inside of a house to maintain it at 68 ? f. show that the heat pump delivers less heat for each joule of electrical energy used to operate the unit as the outside temperature decreases. notice that this behavior is opposite to the dependence of the efficiency of a carnot heat engine on the difference in the reservoir temperatures. explain why this is so. do explain in detail for credit . many in advance.

ansver
Answers: 1

Another question on Physics

question
Physics, 21.06.2019 20:30
Asmall metal bar, whose initial temperature was 10° c, is dropped into a large container of boiling water. how long will it take the bar to reach 70° c if it is known that its temperature increases 2° during the first second? (the boiling temperature for water is 100° c. round your answer to one decimal place.) sec how long will it take the bar to reach 98° c? (round your answer to one decimal place.)
Answers: 2
question
Physics, 21.06.2019 22:20
The place you get your hair cut has two nearly parallel mirrors 6.00 m apart. as you sit in the chair, your head is 2.00 m from the nearer mirror. looking toward this mirror, you first see your face and then, farther away, the back of your head. (the mirrors need to be slightly nonparallel for you to be able to see the back of your head, but you can treat them as parallel in this problem.) how far away does the back of your head appear to be?
Answers: 2
question
Physics, 22.06.2019 15:10
Auniform crate c with mass mc is being transported to the left by a forklift with a constant speed v1. what is the magnitude of the angular momentum of the crate about point a, that is, the point of contact between the front tire of the forklift and the ground
Answers: 3
question
Physics, 22.06.2019 15:10
What does si stand for,when referring to a system of measurement
Answers: 1
You know the right answer?
Aheat pump is a heat enginer run in reverse. in winter it pumps heat from the cold air outside into...
Questions
question
Mathematics, 20.09.2020 02:01
question
Mathematics, 20.09.2020 02:01
question
Mathematics, 20.09.2020 02:01
question
Mathematics, 20.09.2020 02:01
Questions on the website: 13722359