« previous next »

Author Question: For each 4He produced in a proton-proton chain, _____. A) the first reaction must occur four ... (Read 93 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?

Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

Did you know?

Many people have small pouches in their colons that bulge outward through weak spots. Each pouch is called a diverticulum. About 10% of Americans older than age 40 years have diverticulosis, which, when the pouches become infected or inflamed, is called diverticulitis. The main cause of diverticular disease is a low-fiber diet.

Did you know?

Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.

Did you know?

The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.

Did you know?

The horizontal fraction bar was introduced by the Arabs.

Two important changes occur in the upper airway in croup:The epiglottis swells, thereby occluding th Two important changes occur in the upper airway in croup:The epiglottis swells, thereby occluding th
Summary of Precipitation Reaction Summary of Precipitation Reaction
Principles of amplification of selected fragments of DNA by polymerase chain reaction cycling. Principles of amplification of selected fragments of DNA by polymerase chain reaction cycling.
How the cortical reaction in a mouse egg is thought to prevent additional sperm from entering the eg How the cortical reaction in a mouse egg is thought to prevent additional sperm from entering the eg
What is the value for Kp for this reaction? What is the value for Kp for this reaction?
Calico coat, produced by X inactivation in female cats Calico coat, produced by X inactivation in female cats
Video: Introduction to Photolithography - WC, BLF, PA, Hard and Soft baking

For a complete list of videos, visit our video library