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Author Question: A Carnot engine is operated as a heat pump to heat a room in the winter. The heat pump delivers heat ... (Read 208 times)

fbq8i

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on: Jul 29, 2018
A Carnot engine is operated as a heat pump to heat a room in the winter. The heat pump delivers heat to the room at the rate of 34 kJ per second and maintains the room at a temperature of 293 K when the outside temperature is 229 K.
 
  The power requirement for the heat pump under these operating conditions is closest to A) 7500 W.
  B) 6000 W.
  C) 17,000 W.
  D) 13,000 W.
  E) 9600 W.

Question 2

A steel guitar string with a diameter of 0.300 mm and a length of 70.0 cm is stretched by 0.500 mm while being tuned. How much force is needed to stretch the string by this amount? Young's modulus for steel is 2.0  1011 N/m2.
 
  What will be an ideal response?


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connor417

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

A

Answer to Question 2

10.1 N


fbq8i

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Reply 2 on: Jul 29, 2018
Great answer, keep it coming :)

Perkypinki

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Reply 3 on: Yesterday
Excellent

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