Columbia University PHYSICS LABORATORY TUTORIAL

Contents > 1. > 2. > 3. How to Report Errors > 3.1. Number of Significant Digits > 3.2. Absolute and Relative Errors > 3.3. Exercises > 4. > 5.

3.3. Exercises

Usus magister est optimus. In other words, experience is the best teacher. Below are exercises covering the material in this chapter. After you make your selections, click "Submit" to see the answers.
How many significant digits does L = 0.0254 m have?
3
4
5
How do you write T = 1.25578 s ± 0.1247 s keeping two significant digits in the error?
1.3 s ± 0.1 s
1.3 s ± 0.12 s
1.26 s ± 0.12 s
What is the relative error for v = 12.25 m/s ± 0.25 m/s ?
2%
3%
25%
What is the absolute error if the central value is 120 s and the relative error is 5%?
1.2 s
5 s
6 s
Which measurement is most precise?
T = 7.5 s ± 0.2 s
L = 10.0 m ± 0.2 m
D = 5.6 cm ± 4%
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