Author Question: Cometary impacts with Jupiter A) are impossible to observe from Earth. B) are spectacular but do ... (Read 86 times)

Sufayan.ah

  • Hero Member
  • *****
  • Posts: 512
Cometary impacts with Jupiter
 
  A) are impossible to observe from Earth.
  B) are spectacular but do not teach us much.
  C) have been observed from Earth at least twice.
  D) are extremely rare.
  E) would not be catastrophic if they happened on Earth.

Question 2

What is the primary visible color of an emission nebula?
 
  A) blue due to ionized helium atoms
  B) red due to the H line of hydrogen
  C) black, because of dust
  D) blue from the scattering of light off the tiny molecules
  E) red because of reddening by dust



vkodali

  • Sr. Member
  • ****
  • Posts: 357
Answer to Question 1

C

Answer to Question 2

B



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

Did you know?

Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

Did you know?

According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).

Did you know?

Approximately 500,000 babies are born each year in the United States to teenage mothers.

Did you know?

According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

For a complete list of videos, visit our video library