2.2

Question 1

precision

Answer 1

how close repeated measurements are together

Question 2

accuracy

Answer 2

how close the mean value of your results into the true value

Question 3

systematic error

Answer 3

error caused by a mistake in the calibration of the measuring equipment- affects accuracy not precison

Question 4

random error

Answer 4

error caused by fluctuation in the object you are measuring or the equipment (eg. gust of wind affects the temp of your experiment) can affecta cuaracy and precision

Question 5

human error

Answer 5

mistake made by a person resulting in an anomalous result. (happens because you are dumb)

Question 6

resolution

Answer 6

the smallest change a piece of equipment can read

Question 7

for single readings absolute uncertainty is

Answer 7

the actual uncertainty and is the same as the resolution of the measuring equipment

Question 8

for single readings %uncertainty=

Answer 8

(absolute uncertainty/measured value)x100

Question 9

for multiple readings absolute uncertainty is

Answer 9

(largest-smallest value)/2

Question 10

for multiple readings % uncertainty is

Answer 10

(absolute uncertainty/mean)x100

Question 11

rules to combine uncertainties

Answer 11

add the %uncertainties of added, subtracted, mutiplied or divided values. multiply the %uncertainty by the power of any indecies it has(bit like differentiation you dummy)

Question 12

uncertainties from graphs

Answer 12

(gradient of line of best fit–gradient of line of worst fit)/2