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 99 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?

There are 20 feet of blood vessels in each square inch of human skin.

Did you know?

The newest statin drug, rosuvastatin, has been called a superstatin because it appears to reduce LDL cholesterol to a greater degree than the other approved statin drugs.

Did you know?

Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.

Did you know?

Patients should never assume they are being given the appropriate drugs. They should make sure they know which drugs are being prescribed, and always double-check that the drugs received match the prescription.

Did you know?

The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").

For a complete list of videos, visit our video library