« previous next »

Author Question: A refrigerator has a coefficient of performance equal to 4.2. How much work must be done on the ... (Read 170 times)

lilldybug07

  • Hero Member
  • *****
  • Posts: 546
on: Jul 29, 2018
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

  • Sr. Member
  • ****
  • Posts: 318
Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

lilldybug07

  • Hero Member
  • *****
  • Posts: 546
Reply #2 on: Jul 29, 2018
Thank you!


wshriver

  • Sr. Member
  • ****
  • Posts: 318
Reply #3 on: Jul 29, 2018
Always glad to help...


« previous next »
 

Did you know?

An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

Did you know?

Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

Did you know?

Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.

Did you know?

Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.

Did you know?

Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.

Copepods, from Ernst Haeckel's 1904 work Kunstformen der Natur Copepods, from Ernst Haeckel's 1904 work Kunstformen der Natur
The Journey to Work, Philadelphia, 1850 The Journey to Work, Philadelphia, 1850
In many work settings, middle-aged people demonstrate generativity by serving as mentors for their ... In many work settings, middle-aged people demonstrate generativity by serving as mentors for their ...
When the service work is completed, the hoist should be raised slightly and the safety released ... When the service work is completed, the hoist should be raised slightly and the safety released ...
Math work Math work
An automobile engine provides 524 Joules of work to push the pistons and generates 2160 Joules ... An automobile engine provides 524 Joules of work to push the pistons and generates 2160 Joules ...
Video: Morphology of a tomato plant

For a complete list of videos, visit our video library