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How does one calculate the velocity and strengh of a whirlpool?

  1. Mar 13, 2013 #1
    For example the earthquake in Japan awhile back had the strength to capture a boat within it's pull. Yet the whirlpool created when someone pulls a plug on the bathtub is hardly any pull whatsoever. This may be a simplistic way of putting it, and i know it has to do with the amount of water and current. How would something like this be put into a mathematical equation too.

    Thanks
     
  2. jcsd
  3. Mar 13, 2013 #2

    davenn

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    thats purely a question of scale. The small whirlpool in a plughole in the tub will still pull in objects of a relative smaller size

    Dave
     
  4. Mar 14, 2013 #3

    Bobbywhy

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