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Author Question: A -3.0-C point charge and a -9.0-C point charge are initially extremely far apart. How much work ... (Read 114 times)

Mimi

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on: Jul 29, 2018
A -3.0-C point charge and a -9.0-C point charge are initially extremely far apart.
 
  How much work does it take to bring the -3.0-C charge to x = 3.0 mm, y = 0.00 mm and the -9.0-C charge to x = -3.0 mm, y = 0.00 mm? (k = 1/40 = 8.99  109 N  m2/C2)
  A) 40 J
  B) 81 J
  C) 27 J
  D) 6.8 J

Question 2

If a transparency sheet is rubbed with tissue and the transparency and the tissue are then held at rest a short distance from each other, the force between them will be
 
  A) a repulsive electric force.
  B) a repulsive magnetic force.
  C) an attractive electric force.
  D) an attractive magnetic force.
  E) zero.


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aham8f

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

A

Answer to Question 2

C


Mimi

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Reply #2 on: Jul 29, 2018
TY


aham8f

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Reply #3 on: Jul 29, 2018
You're welcome


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