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Moving clocks and time dialation question

  1. Jan 6, 2009 #1
    i'm revising for an exam and have this question posed (this isn't homework)

    what is the maximal velocity for a clock being transported from london to new york if the time differance to a stationary clock should be less than 10^-8 seconds.

    i'm not allowed to use calculators.

    i've tried doing it by t=t'y, but get a velocity of 1/3c, which i think is much too high. anyone have any ideas?

    thanks.
     
  2. jcsd
  3. Jan 6, 2009 #2
    care to show how you got the 1/3c?
     
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