Author Question: For each 4He produced in a proton-proton chain, _____. A) the first reaction must occur four ... (Read 50 times)

strangeaffliction

  • Hero Member
  • *****
  • Posts: 660
For each 4He produced in a proton-proton chain, _____.
 
  A) the first reaction must occur four times.
  B) the first and second reactions must occur twice.
  C) the second and third reactions must occur four times.
  D) the third reaction must occur twice.

Question 2

Which of the following statements is true regarding shock waves?
 
  A) They are predominantly transverse in nature.
  B) They can be produced by the birth of very hot stars.
  C) They are also called shear waves.
  D) They cannot be produced by supernova explosions.



miss.ashley

  • Sr. Member
  • ****
  • Posts: 371
Answer to Question 1

B

Answer to Question 2

B



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question


 

Did you know?

Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

Did you know?

Carbamazepine can interfere with the results of home pregnancy tests. If you are taking carbamazepine, do not try to test for pregnancy at home.

Did you know?

The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

Did you know?

A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

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.

For a complete list of videos, visit our video library