« previous next »

Author Question: For each 4He produced in a proton-proton chain, _____. A) the first reaction must occur four ... (Read 95 times)

strangeaffliction

  • Hero Member
  • *****
  • Posts: 660
on: Jul 27, 2018
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
Reply #1 on: Jul 27, 2018
Answer to Question 1

B

Answer to Question 2

B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

strangeaffliction

  • Hero Member
  • *****
  • Posts: 660
Reply #2 on: Jul 27, 2018
Thanks


miss.ashley

  • Sr. Member
  • ****
  • Posts: 371
Reply #3 on: Jul 27, 2018
Welcome :)


« previous next »
 

Did you know?

More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.

Did you know?

There are actually 60 minerals, 16 vitamins, 12 essential amino acids, and three essential fatty acids that your body needs every day.

Did you know?

All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

Did you know?

Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Reaction coordinate diagram Reaction coordinate diagram
Terminology for Movement Produced by Muscles Terminology for Movement Produced by Muscles
How to find the derivatives of trigonometric functions using the chain rule (Part 2) How to find the derivatives of trigonometric functions using the chain rule (Part 2)
Determining the order and rate constant of an irreversible first-order reaction Determining the order and rate constant of an irreversible first-order reaction
Nucleophilic addition reaction of aldehydes and ketones Nucleophilic addition reaction of aldehydes and ketones
Find derivative using chain rule Find derivative using chain rule
Video: Neural Reflex Arc Animation

For a complete list of videos, visit our video library