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

Author Question: In active galaxies, their central engines may be temporarily fed by A) a sudden surge of star ... (Read 100 times)

stock

  • Hero Member
  • *****
  • Posts: 573
In active galaxies, their central engines may be temporarily fed by
 
  A) a sudden surge of star formation.
  B) a series of supernovae around the core.
  C) the sudden collapse of the core into a supermassive black hole.
  D) a close encounter with a neighbor galaxy.
  E) the fusion of helium into carbon in their cores.

Question 2

Considering Einstein's famous equation, E = mc2, which of the following statements is true?
 
  A) Mass can be turned into energy, but energy cannot be turned back into mass.
  B) It takes a large amount of mass to produce a small amount of energy.
  C) A small amount of mass can be turned into a large amount of energy.
  D) You can make mass into energy if you can accelerate the mass to the speed of light.
  E) One kilogram of mass represents 1 joule of energy.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Sammyo

  • Sr. Member
  • ****
  • Posts: 329
Answer to Question 1

D

Answer to Question 2

C





 

Did you know?

Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.

Did you know?

Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

Did you know?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

Did you know?

Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.

Did you know?

There are more bacteria in your mouth than there are people in the world.

For a complete list of videos, visit our video library