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 68 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?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

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.

For a complete list of videos, visit our video library