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Author Question: About how long ago was the last retreat of the glaciers from North America and Europe? a. 60,000 ... (Read 78 times)

armygirl

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on: Jul 28, 2018
About how long ago was the last retreat of the glaciers from North America and Europe?
 a. 60,000 years
  b. 10,000 years
  c. 2 million years
  d. 6000 years

Question 2

Consider two charged spheres, one with charge +2 C and the other with -2 C. A proton (a positively charged particle) is at the point halfway between the spheres. What is not zero?
 a. the potential energy of the proton
  b. the work to move the proton from infinity to that point
  c. the force on the proton
  d. all of the three above are zero


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Kjones0604

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

b

Answer to Question 2

C


armygirl

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Reply #2 on: Jul 28, 2018
Both answers were spot on, thank you once again


Kjones0604

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Reply #3 on: Jul 28, 2018
Great! Please up vote :D


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