Author Question: Cometary impacts with Jupiter A) are impossible to observe from Earth. B) are spectacular but do ... (Read 85 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?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

Did you know?

Many medications that are used to treat infertility are injected subcutaneously. This is easy to do using the anterior abdomen as the site of injection but avoiding the area directly around the belly button.

Did you know?

Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

For a complete list of videos, visit our video library