« previous next »

Author Question: The size of a galaxy's central black hole is proportional to the mass of its disk. a. True b. ... (Read 98 times)

c0205847

  • Hero Member
  • *****
  • Posts: 531
on: Jul 27, 2018
The size of a galaxy's central black hole is proportional to the mass of its disk.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 2

An atom must emit a photon when a(n) ____.
 
  a. electron moves from a lower to a higher energy level
  b. proton moves from a lower to a higher energy level
  c. proton moves from a higher to a lower energy level
  d. electron moves from a higher to a lower energy level
  e. atom becomes ionized


amit

  • Sr. Member
  • ****
  • Posts: 364
Reply #1 on: Jul 27, 2018
Answer to Question 1

False

Answer to Question 2

d


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

c0205847

  • Hero Member
  • *****
  • Posts: 531
Reply #2 on: Jul 27, 2018
Thanks


amit

  • Sr. Member
  • ****
  • Posts: 364
Reply #3 on: Jul 27, 2018
Welcome :)


« previous next »
 

Did you know?

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

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?

The average office desk has 400 times more bacteria on it than a toilet.

Did you know?

Methicillin-resistant Staphylococcus aureus or MRSA was discovered in 1961 in the United Kingdom. It if often referred to as a superbug. MRSA infections cause more deaths in the United States every year than AIDS.

Methicilli ...
Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

The black-capped chickadee is a permanent resident in biomes with harsh winter conditions. The black-capped chickadee is a permanent resident in biomes with harsh winter conditions.
Size varies greatly among horse breeds, as with this full-sized horse and a miniature horse. Size varies greatly among horse breeds, as with this full-sized horse and a miniature horse.
Black and Tan Coonhound Black and Tan Coonhound
Apparent and True Orbits of Alpha Centauri. Apparent and True Orbits of Alpha Centauri.
ACNE black head. ACNE black head.
Mass spectrometry for identifying an unknown protein isolated from a 2D gel Mass spectrometry for identifying an unknown protein isolated from a 2D gel
Video: Adolescent Diabetes

For a complete list of videos, visit our video library