This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Active galaxies are thought to have _______ in their centers. a. accretion disks b. massive ... (Read 166 times)

Yi-Chen

  • Hero Member
  • *****
  • Posts: 550
on: Jul 27, 2018
Active galaxies are thought to have _______ in their centers.
 
  a. accretion disks
  b. massive black holes
  c. accretion disks and massive black holes
  d. the Local Group
  e. a cluster of galaxies

Question 2

For a star of Sun-like mass, what is the last stage of the nuclear fusion?
 
  a. Hydrogen to helium
  b. Helium to carbon and oxygen
  c. Carbon to magnesium
  d. Fusion goes all the way up to iron.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

juwms

  • Sr. Member
  • ****
  • Posts: 337
Reply #1 on: Jul 27, 2018
Answer to Question 1

c

Answer to Question 2

b


Yi-Chen

  • Hero Member
  • *****
  • Posts: 550
Reply #2 on: Jul 27, 2018
Thank you!


juwms

  • Sr. Member
  • ****
  • Posts: 337
Reply #3 on: Jul 27, 2018
Always glad to help...


« previous next »
 

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Did you know?

The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.

Did you know?

Signs and symptoms that may signify an eye tumor include general blurred vision, bulging eye(s), double vision, a sensation of a foreign body in the eye(s), iris defects, limited ability to move the eyelid(s), limited ability to move the eye(s), pain or discomfort in or around the eyes or eyelids, red or pink eyes, white or cloud spots on the eye(s), colored spots on the eyelid(s), swelling around the eyes, swollen eyelid(s), and general vision loss.

Did you know?

Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

An ecological puzzle: the cicada, Diceroprocta apache, is active when air temperatures would appear An ecological puzzle: the cicada, Diceroprocta apache, is active when air temperatures would appear
Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones
Irregular Galaxies Irregular Galaxies
Interacting and Colliding Galaxies Interacting and Colliding Galaxies
In the Tai Forest a female chimp demonstrates a skill once thought to be unique to humans. Here she In the Tai Forest a female chimp demonstrates a skill once thought to be unique to humans. Here she
Active Transport in Vesicles: Phagocytosis Active Transport in Vesicles: Phagocytosis
Video: ribosome

For a complete list of videos, visit our video library