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Homework Help: Quick Question on Uncertainty of PI

  1. Sep 19, 2007 #1
    1. The problem statement, all variables and given/known data
    http://img413.imageshack.us/img413/226/8m1celf4.gif [Broken]

    On b, why is the pi exp 3.18 +- 0.04 and not .012?

    2. Relevant equations



    3. The attempt at a solution
     
    Last edited by a moderator: May 3, 2017
  2. jcsd
  3. Sep 19, 2007 #2

    D H

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    The 0.012 arises from [itex]\Delta\pi/\pi = 0.012[/itex]. In other words, it is a relative error. Clearing the fraction gves the absolute error: [itex]\Delta\pi = 0.012\pi\approx0.04[/itex]
     
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