Author Question: For each 4He produced in a proton-proton chain, _____. A) the first reaction must occur four ... (Read 213 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?

Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

Did you know?

In inpatient settings, adverse drug events account for an estimated one in three of all hospital adverse events. They affect approximately 2 million hospital stays every year, and prolong hospital stays by between one and five days.

Did you know?

The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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?

Asthma cases in Americans are about 75% higher today than they were in 1980.

For a complete list of videos, visit our video library