Year 12s: what will be the first way you research your future options? >>

Uncertainties

http://filestore.aqa.org.uk/subjects/AQA-PHA6B6X-W-QP-JUN10.PDF

1bi) how do i calculate the percentage uncertainty?
Is it 2d(n-1)x100 / L ?

Reply 1

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Reply 2

lerjj

Absolute uncertainty= 1/2 range
% uncertainty = absolute uncertainty/value

Reply 3

lerjj

Original post by Zenarthra

http://filestore.aqa.org.uk/subjects/AQA-PHA6B6X-W-QP-JUN10.PDF

1bi) how do i calculate the percentage uncertainty?
Is it 2d(n-1)x100 / L ?

This question isn't about percentage uncertainty at all. It's about approximating a formula by removing a part of it that only has a small impact. The table shows how this affects your results with different values of n.