Uncertainties

Question 1

Actual uncertainty

Answer 1

Shows how different the measurement could be from the actual value

Question 2

Percentage uncertainty

Answer 2

Shows how important the difference is

Question 3

How to find uncertainty for an instrument

Answer 3

Uncertainty in one reading- half of the smallest measurable value
Uncertainty in measurement- the smallest measurable value

Question 4

How to find actual uncertainty for repeated readings

Answer 4

Range/ 2

Question 5

When adding or subtracting readings…

Answer 5

Add the actual uncertainties

Question 6

When multiplying or dividing uncertainties…

Answer 6

Add the percentage uncertainties

Question 7

How do you plot uncertainties?

Answer 7

Have error bars around points

Question 8

How do you find percentage uncertainty using a graph?

Answer 8

(best m or c - worse m or c) / best m or c x 100