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Author Question: A planet whose distance from the Sun is 3 AU would have an orbital period of how many Earth-years? ... (Read 81 times)

imanialler

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on: Jul 27, 2018
A planet whose distance from the Sun is 3 AU would have an orbital period of how many Earth-years?
 
  A) 3
  B)
  C)
  D) 9
  E) 81

Question 2

What are the mechanisms that restrict the mass range of stars to about 0.1 to 100 solar masses?
 
  What will be an ideal response?


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Jadwiga9

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Reply #1 on: Jul 27, 2018
Answer to Question 1

B

Answer to Question 2

The low end is set by the resistance to gravitational contraction provided by degeneracy pressure. Stars less than about 0.1 (actually 0.08 ) solar masses do not have enough gravity to compress their cores to high enough temperatures to begin nuclear fusion. The high end is set by radiation pressure: stars more massive than 1-200 solar masses produce so much light that they blow off their outer atmospheres. More mass cannot, therefore, be sustained.


imanialler

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Reply 2 on: Jul 27, 2018
Wow, this really help

juliaf

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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