(needed for my strain calculations) is the percentage uncertainty in a ruler 0.1cm or 0.1mm? Please answer quick.
am i right to say 0.1cm plus or minus?
see this http://www.iesjovellanos.com/antona/apuntes_bilingue/libro3/04-Errors.pdf
Yeah, but am i right that it is 0.1cm?? please say yes or no to help.
To determine the correct percentage uncertainty, we need to know the precision of the ruler. In your case, you mentioned two options: 0.1 cm and 0.1 mm.
If the ruler has divisions of 0.1 cm, then the precision of the ruler is 0.1 cm.
If the ruler has divisions of 0.1 mm, then the precision of the ruler is 0.1 mm.
The percentage uncertainty is calculated by dividing the precision by the measured value and multiplying by 100.
So, to determine which option is correct, it is important to know the units of the measured value. If your measurements are in centimeters, then the ruler with 0.1 cm precision would be applicable. If your measurements are in millimeters, then the ruler with 0.1 mm precision would be applicable.
Without knowing the units of the measured value, it is not possible to determine which ruler to use.