Practical skills Flashcards
1
Q
what is absolute uncertainty on a ruler
A
±1mm
2
Q
calculate percentage uncertainty
A
(absolute uncertainty/measured value)x100
3
Q
how would you calculate the percentage uncertainty of
45±1
A
1/45 x100=2.2
4
Q
how do you calculate percentage uncertainty with multiple measurements
A
(half the range/ mean value)x100
5
Q
how do you work out uncertainty in a graph
A
draw lobf and lowf.
(gradient of lobf-lowf/lobf)x100
6
Q
how would you combine percentage uncertainties in a times or divide question
A
add them together
