Uncertainties in Measurement

Question 1

What is uncertainties in measurement?

Answer 1

you can only be certain of a measurement up to the accuracy of the instrument

Question 2

What is relative uncertainty?

Answer 2

percentage of the absolute uncertainty of the recorded value

Question 3

Calculate the relative uncertainty of 36mm

Answer 3

1mm / 36mm = 2.78%

Question 4

Example of adding

Absolute uncertainty = 0.5 cm ^3

Start: 23.25 < 23.5 < 23.75
End: 65.75 < 66.0 < 66.25

Answer 4

Volume Change: 42 < 42.5 < 43

0.5 + 0.5 = 1.0 / 42.5 = 2.35%

Question 5

What can the calculated results only be reported to?

Answer 5

to the limits of the least accurate measurement