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 34 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?

A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

Did you know?

Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.

Did you know?

Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.

Did you know?

About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

Did you know?

Anesthesia awareness is a potentially disturbing adverse effect wherein patients who have been paralyzed with muscle relaxants may awaken. They may be aware of their surroundings but unable to communicate or move. Neurologic monitoring equipment that helps to more closely check the patient's anesthesia stages is now available to avoid the occurrence of anesthesia awareness.

Interacting and Colliding Galaxies Interacting and Colliding Galaxies
The Sleep/Waking Flip-Flop According to Saper et al. (2001), the major sleep-promoting region (the v The Sleep/Waking Flip-Flop According to Saper et al. (2001), the major sleep-promoting region (the v
Chickenpox rash. (Centers for Disease Control and Prevention [CDC]/Ann Cain) Chickenpox rash. (Centers for Disease Control and Prevention [CDC]/Ann Cain)
HIV cycle in an infected cell: (a) latent infection; (b) active infection. HIV cycle in an infected cell: (a) latent infection; (b) active infection.
Harvard Alumni Study show who are more physically active in middle adulthood Harvard Alumni Study show who are more physically active in middle adulthood
Physical Findings of Massive Hemothorax Physical Findings of Massive Hemothorax
Video: Electrical changes in the heart

For a complete list of videos, visit our video library