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Author Question: As the Universe cooled, it eventually reached a temperature of 3,000 K and protons were able to ... (Read 181 times)

lb_gilbert

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on: Jul 27, 2018
As the Universe cooled, it eventually reached a temperature of 3,000 K and protons were able to capture and hold electrons to form neutral hydrogen. This process is known as
 
  a. ionization.
  b. isotropy.
  c. annihilation.
  d. recombination.
  e. hydration.

Question 2

A star begins fusing hydrogen to helium the moment it leaves the main sequence.
 
  a. True
  b. False
  Indicate whether the statement is true or false


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princessflame2016

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

d

Answer to Question 2

False


lb_gilbert

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Reply #2 on: Jul 27, 2018
Thanks


princessflame2016

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Reply #3 on: Jul 27, 2018
Welcome :)


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