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Author Question: The Department of Energy develops a new reversible engine which has a COP of 4 when operated as a ... (Read 34 times)

nenivikky

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on: Jul 27, 2018
The Department of Energy develops a new reversible engine which has a COP of 4 when operated as a refrigerator and a COP of 5 when operated as a heat pump. What is its efficiency when operated as an engine doing work?
 
  A) 10.
  B) 20.
  C) 25.
  D) 45.
  E) 80.

Question 2

Consider a uniform electric field of 50. N/C directed toward the East. If the voltage measured relative to ground at a given point in the field is 80. V, what is the voltage at a point 1.0 m directly East of the point?
 
  A) 15. V
  B) 30. V
  C) 0.15 kV
  D) 30. kV
  E) impossible to calculate from the information given


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isabelt_18

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Reply #1 on: Jul 27, 2018
Answer to Question 1

B

Answer to Question 2

B


nenivikky

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Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

Sarahjh

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Reply 3 on: Yesterday
Gracias!

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