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What is fractional uncertainty mean?

  1. Jan 24, 2015 #1
    When we calculate fractional uncertainty , we get a percentage of the uncertainty but what does it mean? For example 5% .
     
  2. jcsd
  3. Jan 24, 2015 #2

    Nathanael

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    If I'm traveling 20 m/s with a fractional uncertainty of 5%, then I could actually be traveling anywhere from 19 to 21 m/s
     
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