Practical Skills Flashcards
1
Q
What is the Absolute Uncertainty?
A
The smallest measurement an instrument can measure
(Ruler: 1mm -> 0.1cm -> 0.001m)
2
Q
How do you calculate Absolute Uncertainty?
A
Ab. Unc. = % Unc. x Value
3
Q
What is the Percentage Uncertainty?
A
Absolute Uncertainty expressed as a percentage of the measured value
4
Q
How do you calculate the Percentage Uncertainty?
A
% Unc. = (+/- Ab. Unc.) / Value
x 100
5
Q
What do you do when you add/subtract values with uncertainties?
A
Add the Absolute Uncertainties
6
Q
What do you do when you multiply/divide values with uncertainties?
A
Add the Percentage Uncertainties
7
Q
What do you do when a value with an Uncertainty is raised to a Power?
A
(Using the % Unc.)
The Percentage Uncertainty of quantity ‘x’ (x^n), is equal to:
n(% Unc. of x)
