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 45 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?

There are 20 feet of blood vessels in each square inch of human skin.

Did you know?

As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

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?

After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

For a complete list of videos, visit our video library