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Author Question: The Phanerozoic eon is divided into three main A) epochs B) periods C) eras D) ... (Read 99 times)

jon_i

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on: Jul 27, 2018
The Phanerozoic eon is divided into three main
 
  A) epochs
  B) periods
  C) eras
  D) ages

Question 2

What are the two basic conditions necessary for laser action?
 
  What will be an ideal response?


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SamMuagrove

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

C

Answer to Question 2

population inversion and stimulated emission


jon_i

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Reply 2 on: Jul 27, 2018
YES! Correct, THANKS for helping me on my review

mochi09

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Reply 3 on: Yesterday
Wow, this really help

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