Exam-style question
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A measurement of a liquid's volume is recorded as 200.0 mL with an uncertainty of ±2.0 mL. What is the percentage uncertainty of this measurement?.
- A.1.0%
- B.0.5%
- C.2.0%
- D.0.1%
Model answer
What a good answer should say
- 1.0%
Explanation
Why this works
Percentage uncertainty is calculated using the formula: Percentage Uncertainty = (Absolute Uncertainty / Measured Value) x 100. Substituting gives (2.0 mL / 200.0 mL) x 100 = 1.0%.
Therefore, the percentage uncertainty is 1.0%.
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