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Author Question: Estimate the number of pennies that would fit in a box one foot across by one foot wide by one foot ... (Read 108 times)

beccaep

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on: Jul 29, 2018
Estimate the number of pennies that would fit in a box one foot across by one foot wide by one foot tall.
 
  A)
 
  5  102
 
  B)
 
  5  103
 
  C)
 
  5  104
 
  D)
 
  5  105
 
  E)
 
  5 x 104

Question 2

What is the energy density in the magnetic field 25 cm from a long straight wire carrying a current of 12 A? (0 = 4  10-7 T  m/A)
 
  A) 7.3  10-5 J/m3
  B) 3.6  10-4 J/m3
  C) 3.7  10-5 J/m3
  D) 1.2  10-4 J/m3
  E) The density cannot be determined without knowing the volume.


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fwbard

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

C

Answer to Question 2

C


beccaep

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Reply #2 on: Jul 29, 2018
Thanks


fwbard

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Reply #3 on: Jul 29, 2018
Welcome :)


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