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Author Question: The Main Sequence is the first stellar stage in which energy produced by ________ balances the ... (Read 70 times)

stephzh

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The Main Sequence is the first stellar stage in which energy produced by ________ balances the energy lost by radiation from the surface of the star.
 
  Fill in the blank(s) with correct word

Question 2

The ________ hypothesis was considered plausible in the 1800s, but is it no longer taken seriously.
 
  Fill in the blank(s) with correct word



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fffftttt

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Answer to Question 1

fusion (of hydrogen into helium) or nuclear reactions

Answer to Question 2

collision



stephzh

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Both answers were spot on, thank you once again



fffftttt

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