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Author Question: Very rapid time variations help establish the tiny size of many X-ray sources, showing they must be ... (Read 15 times)

panfilo

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on: Jul 27, 2018
Very rapid time variations help establish the tiny size of many X-ray sources, showing they must be collapsed objects of some kind.
 
  Indicate whether the statement is true or false

Question 2

What can cause a galactic fountain?
 
  A) winds and jets from newly-formed protostars
  B) a supernova occurring in the halo
  C) multiple supernovae occurring together
  D) the combined effect of spiral density waves
  E) molecular clouds falling towards the galactic center


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aham8f

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

TRUE

Answer to Question 2

C


panfilo

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Reply 2 on: Jul 27, 2018
Excellent

daiying98

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Reply 3 on: Yesterday
Gracias!

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