This topic contains a solution. Click here to go to the answer

Author Question: Most active galactic nuclei are found at large distances from us, with relatively few nearby. What ... (Read 55 times)

JMatthes

  • Hero Member
  • *****
  • Posts: 578
Most active galactic nuclei are found at large distances from us, with relatively few nearby. What does this imply?
 
  A) Supermassive black holes existed only when the universe was young, and no longer exist today.
  B) Active galactic nuclei can form only at large distances from the Milky Way.
  C) Active galactic nuclei exist tend to become less active as they age.
  D) The jets seen in many active galactic nuclei must cause them to move far away from us.

Question 2

From the 1970s to the present, the accepted value of H has almost doubled, so
 
  A) the age of the universe is twice as old as we originally believed.
  B) the age of the Universe is half what we believed.
  C) the Copernican principle is not valid beyond our solar system.
  D) the ages of the oldest globular clusters are invalid.
  E) the critical density must also be halved.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

skipfourms123

  • Sr. Member
  • ****
  • Posts: 343
Answer to Question 1

C

Answer to Question 2

B





 

Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Did you know?

The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.

Did you know?

The average office desk has 400 times more bacteria on it than a toilet.

Did you know?

Famous people who died from poisoning or drug overdose include, Adolf Hitler, Socrates, Juan Ponce de Leon, Marilyn Monroe, Judy Garland, and John Belushi.

Did you know?

Aspirin may benefit 11 different cancers, including those of the colon, pancreas, lungs, prostate, breasts, and leukemia.

For a complete list of videos, visit our video library