How is uncertainty presented in physics?

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SUMMARY

Uncertainty in physics is presented through the concept of measurement bounds, specifically the lower and upper limits of a value. In the example discussed, a measurement of 5.76 m has an uncertainty range of 5.75 m to 5.77 m, determined by the precision of the measuring tool, which in this case is a ruler with a minimum scale of 0.01 m. The discussion clarifies that the range of uncertainty cannot exceed the limits set by the measuring instrument, emphasizing the importance of understanding measurement precision in physics.

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  • Understanding of measurement precision in physics
  • Familiarity with significant figures
  • Knowledge of rounding rules
  • Basic concepts of uncertainty in scientific measurements
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MBBphys
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Homework Statement


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?

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The Attempt at a Solution


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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.
 

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