This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: What is the force that keeps a main sequence star from blowing apart? A) magnetism B) ... (Read 61 times)

Haya94

  • Hero Member
  • *****
  • Posts: 558
on: Jul 27, 2018
What is the force that keeps a main sequence star from blowing apart?
 
  A) magnetism
  B) gravitation
  C) the strong force
  D) radiation pressure
  E) electron degeneration pressure

Question 2

Define absorption and emission lines.
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

coyin

  • Sr. Member
  • ****
  • Posts: 334
Reply #1 on: Jul 27, 2018
Answer to Question 1

B

Answer to Question 2

Absorption: When light from a continuous source, such as the dense photosphere of a star, is passed though a thin, cool gas, certain energies from the continuum are absorbed, depending on which elements are present, creating a pattern of dark lines which identify the elements and molecules present in the cool gas cloud. Emission: A hot, thin gas cools off by emitting photons, but only at discrete wavelengths determined by the electron transitions downward of the component atoms. These appear as a pattern of bright emission lines.


Haya94

  • Member
  • Posts: 558
Reply 2 on: Jul 27, 2018
Gracias!

triiciiaa

  • Member
  • Posts: 349
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

Did you know?

The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.

Did you know?

GI conditions that will keep you out of the U.S. armed services include ulcers, varices, fistulas, esophagitis, gastritis, congenital abnormalities, inflammatory bowel disease, enteritis, colitis, proctitis, duodenal diverticula, malabsorption syndromes, hepatitis, cirrhosis, cysts, abscesses, pancreatitis, polyps, certain hemorrhoids, splenomegaly, hernias, recent abdominal surgery, GI bypass or stomach stapling, and artificial GI openings.

Did you know?

The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

Determination of the complete genome sequence of Haemophilus influenzae by Venter, Smith, and collea Determination of the complete genome sequence of Haemophilus influenzae by Venter, Smith, and collea
A crescent Moon and "star" A crescent Moon and "star"
The same star field photographed with (a) a ground-based telescope, which is subject to poor seeing The same star field photographed with (a) a ground-based telescope, which is subject to poor seeing
Despite the traditional focus on males, females actively choose mates and are the driving force in t Despite the traditional focus on males, females actively choose mates and are the driving force in t
finding resultant for the following force combinations finding resultant for the following force combinations
Opener Alignment comparing DNA sequence for the leptin gene from dogs (top) and humans (bottom) Opener Alignment comparing DNA sequence for the leptin gene from dogs (top) and humans (bottom)
Video: Stomach peristalsis & Enterogastric reflex

For a complete list of videos, visit our video library