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The moon's tide generating force is roughly what multiple of the sun's?

  • A.about ten times
  • B.about the same
  • C.about twice
  • D.about half

Answer: C

The sun is far more massive but very much further away, and the force varies with the inverse cube of distance. The lunar contribution therefore dominates the tide by roughly a factor of two. Distance matters far more than mass in this calculation.

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