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 130 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?

The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.

Did you know?

In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

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?

Approximately 25% of all reported medication errors result from some kind of name confusion.

Did you know?

Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

Active transport of molecules Active transport of molecules
Barred Spiral Galaxies Barred Spiral Galaxies
Gravitational Lensing of Extremely Distant Galaxies Gravitational Lensing of Extremely Distant Galaxies
Mechanisms of active and passive immunity Mechanisms of active and passive immunity
Active Transport in Vesicles: Bulk Phase Endocytosis (Pinocytosis) Active Transport in Vesicles: Bulk Phase Endocytosis (Pinocytosis)
Polar distribution of auxin is driven by asymmetrical positioning of plasma membrane active transpor Polar distribution of auxin is driven by asymmetrical positioning of plasma membrane active transpor
Video: Structures that affect circulation - kidneys and blood volume and skeletal muscle pumping

For a complete list of videos, visit our video library