Question

6.0cm length measured with a ruler marked in mm what is the absolute uncer

Answer 1

The absolute uncertainty of a measurement device is equal to the half of its the smalles mark. If the ruler is marked in mm, then the absolute uncertainty of this measurement is:

$$\Delta l =\dfrac{1mm}{2}= 0.5mm = 0.5\times 10^{-3}m$$

Answer. $\Delta l =0.5\times 10^{-3}m$.