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Author Question: Three equal charges of magnitude + 4.00 C are placed at the corners of an equilateral triangle of ... (Read 85 times)

armygirl

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on: Jul 29, 2018
Three equal charges of magnitude + 4.00 C are placed at the corners of an equilateral triangle of side 2.00 cm. What is the electric potential energy of the system of these charges?
 
  A)
 
  90.0 J
  B)
 
  900 mJ
  C)
 
  0 J
  D)
 
  216 mJ
  E)
 
  21.6 J

Question 2

What is the critical angle for light traveling from crown glass (n = 1.52 ) into water (n = 1.33)?
 
  A)
 
  42
  B)
 
  48
  C)
 
  53
  D)
 
  57
  E)
 
  61


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meryzewe

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Reply #1 on: Jul 29, 2018
Answer to Question 1

E

Answer to Question 2

E


armygirl

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Reply 2 on: Jul 29, 2018
Great answer, keep it coming :)

irishcancer18

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Reply 3 on: Yesterday
Wow, this really help

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