Mutleybm1996
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Just to check, if a balance can measure with a graduation of 0.1g is it's tolerance therefore 0.05grams?

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username1445490
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Yes any reading have a tolerance of + or - 0.05g
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Shadoo
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(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


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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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Mutleybm1996
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(Original post by Shadoo)
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?



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Shadoo
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(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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Mutleybm1996
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(Original post by Shadoo)
Is that the exact question?
Yes, my teacher isn't very good at phrasing questions.


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Shadoo
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(Original post by Mutleybm1996)
Yes, my teacher isn't very good at phrasing questions.


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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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Mutleybm1996
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(Original post by Shadoo)
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?

Thank you for your help
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