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Author Question: What is the force that keeps a main sequence star from blowing apart? A) magnetism B) ... (Read 64 times)

Haya94

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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?


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coyin

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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

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Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

diana chang

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Reply 3 on: Yesterday
Excellent

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