« previous next »

Author Question: Which of the following statements about rich clusters of galaxies (those with thousands of galaxies) ... (Read 64 times)

misspop

  • Hero Member
  • *****
  • Posts: 540
on: Jul 27, 2018
Which of the following statements about rich clusters of galaxies (those with thousands of galaxies) is not true?
 
  A) They are sources of X-ray emission due to the presence of hot, intergalactic gas.
  B) There likely have been numerous collisions among the member galaxies at some time in the past.
  C) Galaxies in the central regions are predominantly spirals, while elliptical galaxies roam the outskirts.
  D) They often have a very large, central dominant galaxy near their center, perhaps formed by the merger of several individual galaxies.
  E) The speeds of the galaxies in the cluster indicate that most of the cluster mass is dark matter.

Question 2

Black holes with masses greater than a million solar masses explain the extremely rapidly moving stars and gas in the cores of galaxies.
 
  Indicate whether the statement is true or false


Moriaki

  • Sr. Member
  • ****
  • Posts: 341
Reply #1 on: Jul 27, 2018
Answer to Question 1

C

Answer to Question 2

TRUE


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

misspop

  • Hero Member
  • *****
  • Posts: 540
Reply #2 on: Jul 27, 2018
Thank you!


Moriaki

  • Sr. Member
  • ****
  • Posts: 341
Reply #3 on: Jul 27, 2018
Always glad to help...


« previous next »
 

Did you know?

Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

Did you know?

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

Did you know?

Drug-induced pharmacodynamic effects manifested in older adults include drug-induced renal toxicity, which can be a major factor when these adults are experiencing other kidney problems.

Did you know?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

Did you know?

Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

Elliptical Galaxies Elliptical Galaxies
Gravitational Lensing of Extremely Distant Galaxies Gravitational Lensing of Extremely Distant Galaxies
Galaxies Forming by Combining Smaller Units Galaxies Forming by Combining Smaller Units
This fisherwoman from Kerry, one of the poorest counties in Ireland, may have been one of the many t This fisherwoman from Kerry, one of the poorest counties in Ireland, may have been one of the many t
Ratings of Perceived Contradictions in Political Statements Ratings of Perceived Contradictions in Political Statements
How to convert verbal statements into algebraic equations (Part 2) How to convert verbal statements into algebraic equations (Part 2)
Video: HDL (high density lipoprotein)

For a complete list of videos, visit our video library