Author Question: An insulator has a positive electric charge of 8 10 -17 C. How many electrons were added or ... (Read 92 times)

mmm

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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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Answer to Question 1

a

Answer to Question 2

c



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