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Author Question: Within the last two and a half billion years, how many snowball Earth events have occurred? A) ... (Read 62 times)

B

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on: Jul 27, 2018
Within the last two and a half billion years, how many snowball Earth events have occurred?
 
  A) zero
  B) one
  C) two
  D) four

Question 2

Two spaceships are traveling through space at velocities of 0.600c and 0.900c, respectively, with respect to Earth. If they are headed directly toward each other, what is their approach velocity, as measured by the captain of either ship?
 
  What will be an ideal response?


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bdobbins

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

C

Answer to Question 2

0.974c


B

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Reply 2 on: Jul 27, 2018
Excellent

patma1981

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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