« previous next »

Author Question: The visible parts of galaxies contribute about one-tenth of the critical density of the universe. ... (Read 36 times)

jace

  • Hero Member
  • *****
  • Posts: 541
on: Jul 27, 2018
The visible parts of galaxies contribute about one-tenth of the critical density of the universe.
 
  Indicate whether the statement is true or false

Question 2

In M82, observations indicate that there are several bright sources close to the center of the galaxy. These might be
 
  A) supernovae.
  B) accretion disks of supermassive black holes, millions of times as massive as our sun.
  C) accretion disks of intermediate black holes, hundreds of times as massive as our sun.
  D) accretion disks of stellar mass black holes.
  E) red giants in the process of forming planetary nebulae.


Awesome

  • Sr. Member
  • ****
  • Posts: 280
Reply #1 on: Jul 27, 2018
Answer to Question 1

FALSE

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

Did you know?

Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.

Did you know?

About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

Did you know?

Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.

Did you know?

Glaucoma is a leading cause of blindness. As of yet, there is no cure. Everyone is at risk, and there may be no warning signs. It is six to eight times more common in African Americans than in whites. The best and most effective way to detect glaucoma is to receive a dilated eye examination.

The peripheral nerves connect the brain and spinal cord to other parts of the body. The peripheral nerves connect the brain and spinal cord to other parts of the body.
Spiral Galaxies Seen Nearly Edge On from the Milky Way Spiral Galaxies Seen Nearly Edge On from the Milky Way
Irregular Galaxies Irregular Galaxies
How to apply integration by parts on a single function How to apply integration by parts on a single function
Days 24–25 Pharyngeal arches develop. They will contribute to the face, neck, larynx, and pharynx. Days 24–25 Pharyngeal arches develop. They will contribute to the face, neck, larynx, and pharynx.
Video: Hormonal feedback loop components

For a complete list of videos, visit our video library