1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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

    User Avatar
    Staff Emeritus
    Science Advisor

    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]
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook