An ideal reversible heat pump is taking heat from the outside air ...

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An ideal reversible heat pump is taking heat from the outside air at -10.0C and discharging it into the house at 18.0C. What is the coefficient of performance of this heat pump?
 
  A) 10.4
  B) 9.44
  C) 0.644
  D) 0.533
  E) 0.0962

Question 2

What is the surface temperature of a star, if its radiation peak occurs at a frequency of 1.06  1015 Hz? (c = 3.00  108 m/s, and the constant in Wien's law is 0.00290 m  K)
 
  A) 17,000 K
  B) 14,500 K
  C) 19,000 K
  D) 20,400 K
  E) 10,200 K

[shaikhs]

Answer to Question 1

A

Answer to Question 2

E

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Excellent

[isabelt_18]

Gracias!