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Author Question: Three identical bar magnets, each 2 cm long, are placed in a straight line on a frictionless surface ... (Read 161 times)

jake

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on: Jul 28, 2018
Three identical bar magnets, each 2 cm long, are placed in a straight line on a frictionless surface with their ends equally spaced with 2 cm between ends. They are constrained so they cannot rotate, but they can slide along the straight line. The left magnet has its north pole nearest the north pole of the middle magnet, and the right magnet has its south pole toward the middle magnet's south pole. Once they are in place and released from rest, which of the following best describes the motion of the magnets?
 a. The end magnets will move away from the center magnet.
  b. The magnets will not move since they are equally spaced. c. The magnets will snap together.
  d. None of the above would happen.

Question 2

A cube of wood of density 0.64 g/cm3 is 10 cm on a side. When placed in water, what height of the block will float above the surface? (water density = 1.00 g/cm3)
 a. 7.8 cm
  c. 2.2 cm
  b. 3.6 cm
  d. 6.4 cm


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janeli

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

A

Answer to Question 2

B


jake

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Reply #2 on: Jul 28, 2018
Thanks


janeli

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Reply #3 on: Jul 28, 2018
Welcome :)


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