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

Author Question: Which statement about the dark nebulae is true? A) Hydrogen and helium are the chief absorbing ... (Read 26 times)

asmith134

  • Hero Member
  • *****
  • Posts: 576
Which statement about the dark nebulae is true?
 
  A) Hydrogen and helium are the chief absorbing and scattering agents.
  B) They block the vast majority of radio waves from our Galaxy.
  C) They can be penetrated only with longer wavelengths such as radio and infrared.
  D) They comprise the majority of the mass of the Galaxy.
  E) They can be penetrated only with shorter waves, such as UV and X-ray.

Question 2

Which of the following planets cannot be seen with the naked eye?
 
  A) Venus
  B) Mars
  C) Jupiter
  D) Saturn
  E) Neptune



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

carojassy25

  • Sr. Member
  • ****
  • Posts: 299
Answer to Question 1

C

Answer to Question 2

E





 

Did you know?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Did you know?

More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

Did you know?

To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.

Did you know?

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

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates’s recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

For a complete list of videos, visit our video library