Author Question: Perpetual motion machines without an additional energy input cannot exist because A) energy ... (Read 72 times)

RODY.ELKHALIL

  • Hero Member
  • *****
  • Posts: 591
Perpetual motion machines without an additional energy input cannot exist because
 
  A) energy cannot be created or destroyed.
  B) in any energy conversion, some energy is lost.
  C) energy cannot be converted from one form to another.
  D) kinetic energy requires an input of light energy.

Question 2

In nuclear power plants in the United States, near-pure water functions as
 
  A) a moderator, heating up as it slows down neutrons, which triggers additional fission reactions.
  B) a moderator, cooling down as it slows down neutrons that could cause fusion reactions.
  C) an inhibitor, preventing neutrons from heating up and causing fusion reactions.
  D) an inhibitor, preventing neutrons from cooling down and stopping the fission reactions.



al

  • Sr. Member
  • ****
  • Posts: 344
Answer to Question 1

B

Answer to Question 2

A



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

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?

The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

Did you know?

Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.

Did you know?

Everyone has one nostril that is larger than the other.

For a complete list of videos, visit our video library