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Author Question: A heating element having a resistance (at its operating temperature) of 148 is connected to a ... (Read 36 times)

tiara099

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on: Jul 29, 2018
A heating element having a resistance (at its operating temperature) of 148  is connected to a battery having an emf of 523 V and unknown internal resistance.
 
  It is found that thermal energy is being generated in the resistance of the heating element at a rate of 66.0 W. What is the rate at which thermal energy is being generated in the internal resistance of the battery?

Question 2

Suppose that the Department of Energy develops a new reversible engine that has a coefficient of performance (COP) of 4.0 when operated as a refrigerator and a COP of 5.0 when operated as a thermodynamic pump.
 
  What is its thermal efficiency when operated as a thermodynamic engine doing work? A) 10
  B) 20
  C) 25
  D) 45
  E) 80


amynguyen1221

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Reply #1 on: Jul 29, 2018
Answer to Question 1

283 W

Answer to Question 2

B


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