# Tolerance of equipment question

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#1
Just to check, if a balance can measure with a graduation of 0.1g is it's tolerance therefore 0.05grams?

Thank you

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5 years ago
#2
Yes any reading have a tolerance of + or - 0.05g
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5 years ago
#3
(Original post by Mutleybm1996)
Just to check, if a balance can measure with a graduation of 0.1g is it's tolerance therefore 0.05grams?

Thank you

Posted from TSR Mobile
Yes if the unit is to 1 decimal place then then their is an uncertainty margin of +/- 0.05 e.g. 0.05 would be shown as 0.1 and 0.149 would be shown as 0.1 therefore the actual value could lie anywhere within 0.05<x<0.15
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#4
Yes if the unit is to 1 decimal place then then their is an uncertainty margin of +/- 0.05 e.g. 0.05 would be shown as 0.1 and 0.149 would be shown as 0.1 therefore the actual value could lie anywhere within 0.05<x<0.15
Thank you for your quick response.
I should post this in the Physics forum but I never seem to get a reply so I was wondering if you could help me with this too:

i have a ruler that can measure +-0.5mm, i use this to take a measurement for the length of a piece of card, this gives me 194+-0.5mm, i then use this in a light gate to measure speed, what can the lightgate therefore measure to?

Thank you

Posted from TSR Mobile
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5 years ago
#5
(Original post by Mutleybm1996)
Thank you for your quick response.
I should post this in the Physics forum but I never seem to get a reply so I was wondering if you could help me with this too:

i have a ruler that can measure +-0.5mm, i use this to take a measurement for the length of a piece of card, this gives me 194+-0.5mm, i then use this in a light gate to measure speed, what can the lightgate therefore measure to?

Thank you

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Is that the exact question?
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#6
Is that the exact question?
Yes, my teacher isn't very good at phrasing questions.

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5 years ago
#7
(Original post by Mutleybm1996)
Yes, my teacher isn't very good at phrasing questions.

Posted from TSR Mobile
well the lightgate would be measuring speed so the light gate can measure to (194 ± 0.50)mm/time which depends on how accurate it times it.
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#8
well the lightgate would be measuring speed so the light gate can measure to (194 ± 0.50)mm/time which depends on how accurate it times it.
Thank you, could you possibly reiterate the difference between Tolerance and Uncertainty?
Also, I used an old version of a light gate for my experiment, if it gave me a reading of 0.102s to travel 10cm, the accuracy would be 0.102+-0.0005 seconds, correct? Unfortunately we're on holiday, this is due in next tuesday and my teacher hasn't responded to my email asking if he knew the uncertainty/tolerance. Also, if a balance had a 'graduation' of 0.1g, this is the accuracy, correct?

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