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 54 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
Great answer, keep it coming :)

parker125

  • Member
  • Posts: 332
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Did you know?

Approximately 25% of all reported medication errors result from some kind of name confusion.

Did you know?

The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

Did you know?

As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

Circumpolar Star Trails Circumpolar Star Trails
Pre–Main-Sequence Stars Pre–Main-Sequence Stars
Gravitational Force Due to a Distribution of Mass Problem 1 Gravitational Force Due to a Distribution of Mass Problem 1
An insertion sequence (IS), shown in purple An insertion sequence (IS), shown in purple
Modern-day dust cloud blowing from Africa’s Sahara Modern-day dust cloud blowing from Africa’s Sahara
Relationship of a DNA base sequence to peptide structure Relationship of a DNA base sequence to peptide structure
Video: Ear Virtual Tour Animation

For a complete list of videos, visit our video library