Percentage uncertainties

Question 1

What is uncertainty?

Answer 1

= cant confirm that the value recorded is the true volume, it may lie in a ranger of possible values

Question 2

What does uncertainty depend on?

Answer 2

= measuring instrument
= resolution: smallest value that can be recorded
= procedure has uncertaint- reduce this by carrying repeat
= making a judgement

Question 3

What is a reading?

Answer 3

= single value

Question 4

What is a measurement?

Answer 4

= difference between 2 judgement
= have to take 2 readings
= e.g from ruler
= a change- like a change in temperature

Question 5

What is the uncertainty at repeated measurements ?

Answer 5

+- half the range

Question 6

What is the percentage uncertainty for a reading?

Answer 6

= absolute uncertainty/measurement x 100

Question 7

What is total percentage uncertainty fri an experiment?

Answer 7

= sum of % uncertaintiies for each reading or measurment

Question 8

How to reduce the percentage uncertaintity?

Answer 8

= depends on equipment being more sensitive equipment has a smaller uncertaintiyt
= without changing the equipment: do sometjong tjay increases measurement
=

Question 9

What can also be a measuremebt?

Answer 9

= a change, so change in temperature change in mass