This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A reversible engine takes in 555. Joules per second and exhausts 482. watts. (a) How much power ... (Read 97 times)

fox

  • Hero Member
  • *****
  • Posts: 540
on: Jul 27, 2018
A reversible engine takes in 555. Joules per second and exhausts 482. watts.
 
  (a) How much power does it produce?
  (b) What is its efficiency?
  (c) If operated in reverse as a refrigerator, what would be its COP?

Question 2

If the communication lifetime of civilizations in our galaxy is 100 million years and our galaxy is 13 billion years old, what is the chance of us detecting another intelligent civilization now?
 
  A) 1 in 1,300,000
  B) 1 in 13
  C) 1 in 1300
  D) 1 in 130


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

dpost18

  • Sr. Member
  • ****
  • Posts: 345
Reply #1 on: Jul 27, 2018
Answer to Question 1

(a) 73. watts
(b) 13.2
(c) 6.60

Answer to Question 2

C


fox

  • Hero Member
  • *****
  • Posts: 540
Reply #2 on: Jul 27, 2018
Thanks


dpost18

  • Sr. Member
  • ****
  • Posts: 345
Reply #3 on: Jul 27, 2018
Welcome :)


« previous next »
 

Did you know?

Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

Did you know?

The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.

Did you know?

The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.

Did you know?

Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.

Did you know?

The average adult has about 21 square feet of skin.

The power and control wheel illustrates the strategies that one partner may use to intimidate, ... The power and control wheel illustrates the strategies that one partner may use to intimidate, ...
The bore and stroke of pistons are used to calculate an engine’s displacement. The bore and stroke of pistons are used to calculate an engine’s displacement.
The malfunction indicator lamp might be labeled “service engine soon,” which can cause ... The malfunction indicator lamp might be labeled “service engine soon,” which can cause ...
This is what was found when removing an air filter from a vehicle that had a lack-of-power concern. ... This is what was found when removing an air filter from a vehicle that had a lack-of-power concern. ...
Find the derivative using the power rule Q2 Find the derivative using the power rule Q2
An automobile engine generates 2160 Joules of heat that must be carried away by An automobile engine generates 2160 Joules of heat that must be carried away by
Video: Covalent bonds - role in the body

For a complete list of videos, visit our video library