« previous next »

Author Question: A refrigerator has a coefficient of performance equal to 4.2. How much work must be done on the ... (Read 88 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?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Did you know?

The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

Did you know?

Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

Did you know?

People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

Did you know?

Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

Cade and colleagues discovered a way to improve athletic performance and prevent salt and water imba Cade and colleagues discovered a way to improve athletic performance and prevent salt and water imba
Which do you think is most at work in a debate contest, mastery- or performance-goal orientations or ... Which do you think is most at work in a debate contest, mastery- or performance-goal orientations or ...
Men who are at risk for heart disease and report work-related stressors are at greater risk of death ... Men who are at risk for heart disease and report work-related stressors are at greater risk of death ...
Many European Americans are involved in ethnic work, attempting to maintain an identity more precise ... Many European Americans are involved in ethnic work, attempting to maintain an identity more precise ...
Work and Gender: Women at Work in India Work and Gender: Women at Work in India
Where do Psychological Practitioners Work? Where do Psychological Practitioners Work?
Video: Knee Animation

For a complete list of videos, visit our video library