A refrigerator has a coefficient of performance equal to 4.2. How ...

[lilldybug07]

A refrigerator has a coefficient of performance equal to 4.2. How much work must be done on the refrigerator in order to remove 250 J of heat from the interior?
 
  A)
 
  60 J
 
  B)
 
  120 J
 
  C)
 
  250 J
 
  D)
 
  480 J
 
  E)
 
  1050 J

Question 2

As a particle travels faster, its de Broglie wavelength
 
  A)
 
  increases.
  B)
 
  decreases.
  C)
 
  remains constant.
  D)
 
  could be any of the given answers; it depends on other factors.

[wshriver]

Answer to Question 1

A

Answer to Question 2

B

[lilldybug07]

Thank you!

[wshriver]

Always glad to help...