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Author Question: Two objects attract each other gravitationally. If the distance between their centers is cut in ... (Read 80 times)

LCritchfi

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on: Jul 29, 2018
Two objects attract each other gravitationally. If the distance between their centers is cut in half, the gravitational force
 
  A) is cut to one fourth.
  B) is cut in half.
  C) doubles.
  D) quadruples
  E) remains the same

Question 2

A far sighted person can not see clearly objects that are closer to his eyes than 60.0 cm.
 
  Which one of the following combinations represents the correct focal length and the refractive power of the contact lenses that will enable him to see the objects at a distance of 25.0 cm from his eyes? A) -42.9 cm, +2.33 diopters
  B) -42.9 cm, -2.33 diopters
  C) +42.9 cm, +2.33 diopters
  D) +42.9 cm, -2.33 diopters
  E) +60 cm, +42.9 diopters


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scrocafella

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

D

Answer to Question 2

C


LCritchfi

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Reply #2 on: Jul 29, 2018
Both answers were spot on, thank you once again


scrocafella

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Reply #3 on: Jul 29, 2018
Great! Please up vote :D


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