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Author Question: Neutral hydrogen can be detected because its electron occasionally ________ its spin and creates the ... (Read 48 times)

justinmsk

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on: Jul 27, 2018
Neutral hydrogen can be detected because its electron occasionally ________ its spin and creates the 21-cm emission line for radio observers.
 
  Fill in the blank(s) with correct word

Question 2

The one term of the Drake equation whose value remains completely unknown is the average lifetime of a technological civilization.
 
  Indicate whether the statement is true or false


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vickybb89

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

flips or switches or reverses

Answer to Question 2

TRUE


justinmsk

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Reply 2 on: Jul 27, 2018
Excellent

xiaomengxian

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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