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Q about moon and sun tides, energy related to comet strikes and the mass water?

  1. Oct 10, 2012 #1
    Please see attatchment for qs. I really need help with number two mostly.

    Attached Files:

  2. jcsd
  3. Oct 10, 2012 #2


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    2017 Award

    Staff: Mentor

    rearth is the radius of earth without tides. It has a potential, given by the gravitational field of earth. If you add the potential contribution from the moon, the potential will change. Try to determine the height h where the (new) potential is equivalent to the old potential at rearth.
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