Measurement & Uncertainty

How sure are you?

An interactive lesson with 6 steps, about 5 minutes: you predict, drag and solve, with instant feedback on every answer. It runs in your browser and needs JavaScript.

What you’ll learn

• Precision: readings agree with each other. Accuracy: readings are close to the truth.
• Adding or subtracting: add absolute uncertainties.
• Multiplying or dividing: add percentage uncertainties.

Steps

1. Accuracy vs precision
2. Writing uncertainty
3. Averaging away the scatter
4. Adding lengths
5. Percentage uncertainty
6. Area of a square