This topic contains a solution. Click here to go to the answer

Author Question: Which of the following is true of Seyfert galaxies? A) They have inactive nuclei. B) They ... (Read 9 times)

madam-professor

  • Hero Member
  • *****
  • Posts: 584
Which of the following is true of Seyfert galaxies?
 
  A) They have inactive nuclei.
  B) They mostly contain dying stars.
  C) The spectra of their nuclei contain broad emission lines of highly ionized atoms.
  D) The velocities of gas clouds at their centers are much less than velocities at the center of normal galaxies.

Question 2

The major observational difference between a Seyfert galaxy and a normal spiral galaxy is that, unlike a normal spiral galaxy, a Seyfert galaxy:
 
  A) usually has shorter spiral arms.
  B) does not have a black hole at its center.
  C) has a small, highly luminous nucleus in its bulge.
  D) does not contain young stars in its spiral arms.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

mmj22343

  • Sr. Member
  • ****
  • Posts: 297
Answer to Question 1

C

Answer to Question 2

C




madam-professor

  • Member
  • Posts: 584
Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it


mammy1697

  • Member
  • Posts: 341
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

 

Did you know?

Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.

Did you know?

Every flu season is different, and even healthy people can get extremely sick from the flu, as well as spread it to others. The flu season can begin as early as October and last as late as May. Every person over six months of age should get an annual flu vaccine. The vaccine cannot cause you to get influenza, but in some seasons, may not be completely able to prevent you from acquiring influenza due to changes in causative viruses. The viruses in the flu shot are killed—there is no way they can give you the flu. Minor side effects include soreness, redness, or swelling where the shot was given. It is possible to develop a slight fever, and body aches, but these are simply signs that the body is responding to the vaccine and making itself ready to fight off the influenza virus should you come in contact with it.

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?

Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.

Did you know?

Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.

For a complete list of videos, visit our video library