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Author Question: The density wave theory explains spurs and branches along the spiral arms. a. True b. False ... (Read 80 times)

Diane

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on: Jul 27, 2018
The density wave theory explains spurs and branches along the spiral arms.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 2

A spectral line produced in the atmosphere of a star may be seen as broad whereas interstellar _______________ lines are very narrow.
 
  a. absorption b. continuous
  c. emission d. All of the other choices are correct.


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jordangronback

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

False

Answer to Question 2

a


Diane

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Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it

kthug

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Reply 3 on: Yesterday
Wow, this really help

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