« previous next »

Author Question: Which of the following statements about rich clusters of galaxies (those with thousands of galaxies) ... (Read 107 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?

The Centers for Disease Control and Prevention has released reports detailing the deaths of infants (younger than 1 year of age) who died after being given cold and cough medications. This underscores the importance of educating parents that children younger than 2 years of age should never be given over-the-counter cold and cough medications without consulting their physicians.

Did you know?

The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.

Did you know?

Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

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?

Many people have small pouches in their colons that bulge outward through weak spots. Each pouch is called a diverticulum. About 10% of Americans older than age 40 years have diverticulosis, which, when the pouches become infected or inflamed, is called diverticulitis. The main cause of diverticular disease is a low-fiber diet.

Barred Spiral Galaxies Barred Spiral Galaxies
Elliptical Galaxies Elliptical Galaxies
A Cluster of Galaxies A Cluster of Galaxies
On August 17, 1807, thousands of New Yorkers gathered along the Hudson River. Ma On August 17, 1807, thousands of New Yorkers gathered along the Hudson River. Ma
School is over—but not for this student. After the regular school day, hundreds of thousands in ... School is over—but not for this student. After the regular school day, hundreds of thousands in ...
Organic-rich marine clays Organic-rich marine clays
Video: Medullary osmotic gradient: countercurrent multiplier, urea recycling & vasa recta countercurrent exchange

For a complete list of videos, visit our video library