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: Uncertainty in physics

  1. Sep 15, 2015 #1


    User Avatar
    Gold Member

    1. The problem statement, all variables and given/known data
    How is uncertainty presented in physics?
    If we have:
    5.76 m rounded-->wouldn't the range of uncertainty be between the lower and upper bound:
    5.755m - 5.765 m
    However, my physics teacher said that, as the ruler you are measuring with in this scenario goes down to 0.01 m, you cannot go below that, so the range of uncertainty:
    5.75m - 5.77m
    Am I confusing lower/upper bound and range of uncertainty here?

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Sep 15, 2015 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    I agree with your interpretation.

    At university one of our lecturers told us that humans were actually quite good at estimating to within 1/10th of the smallest scale. In other words if your smallest scale is centimetres then humans are quite good at estimating to within +/- 1mm.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted