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Author Question: An insulator has a positive electric charge of 8 10 -17 C. How many electrons were added or ... (Read 40 times)

mmm

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on: Jul 28, 2018
An insulator has a positive electric charge of 8  10 -17 C. How many electrons were added or removed?
 a. 500 electrons removed
  b. 20 electrons removed
  c. 500 electrons added
  d. 20 electrons added

Question 2

A far-sighted student has a near point of 1.0 m. Calculate the focal length (in cm) of the glasses needed so the near point will be normal (25 cm).
 a. 72
  b. 25
  c. 33
  d. 100
  e. 33


CharlieArnold

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Reply #1 on: Jul 28, 2018
Answer to Question 1

a

Answer to Question 2

c


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