Practical skills

Question 1

what is absolute uncertainty on a ruler

Answer 1

±1mm

Question 2

calculate percentage uncertainty

Answer 2

(absolute uncertainty/measured value)x100

Question 3

how would you calculate the percentage uncertainty of
45±1

Answer 3

1/45 x100=2.2

Question 4

how do you calculate percentage uncertainty with multiple measurements

Answer 4

(half the range/ mean value)x100

Question 5

how do you work out uncertainty in a graph

Answer 5

draw lobf and lowf.

(gradient of lobf-lowf/lobf)x100

Question 6

how would you combine percentage uncertainties in a times or divide question

Answer 6

add them together