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ddd [48]
3 years ago
11

A heat pump has a coefficient of performance of 4. if the heat pump absorbs 20 cal of heat from the cold outdoors per cycle, how

much heat in cal is expelled into the warm room
Physics
1 answer:
Lubov Fominskaja [6]3 years ago
5 0
A heat pump has a coefficient of performance of 7.05. If the heat pump absorbs 20 cal of heat from the cold outdoors in each cycle, find the heat expelled to the warm indoors. Answer in units of cal. I believe COP (heating mode) : 7.05 and COP = Qh/W Qc = 20 cal so I have to find Qh= ? cal I dont know an equation to put all this together? Please help, thank you.

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What is the displacement of a NASCAR stock car after he completes the Indianapolis 500?
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I'm such a devoted NASCAR fan that I don't even know if the starting line and finish line at Indy are the same line ... or maybe they're in different places, like the 100-meter sprint in track.

I have no idea, but I'm going to guess that the start and finish at Indy are the SAME line.  

If that's true, then the displacement of a car that runs the whole 500 miles is very close to <em>ZERO</em>.

Displacement is the distance and direction between the place where the object starts out and the place where it ends up.  The route it follows to get from the start to the finish is completely ignored, and doesn't matter.

(Do they the Indianapolis 500 in "stock" cars ? ?)

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3 years ago
A student claims that water's polarity is the reason it has a high specific heat. What method could the student use to test his
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The frequency of which type of eletromagtic wave i just higher than that of visible light
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The volume coefficient of thermal expansion for gasoline is 950 × 10 -6 K -1. By how many cubic centimeters does the volume of 1
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Answer:

  19 cm³

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The coefficient of thermal expansion is the ratio of the change in volume to the reference volume for each degree change in temperature. Hence the change in volume is found by multiplying by the reference volume and the change in temperature.

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