A length is quoted as 2.0mm. What is the absolute uncertainty implied by this number?

If the uncertainty associated with a value is not specified, It is assumed to be + - 1 in final digit. so absolute uncertainty implied by this number is + - 0.1mm

(2.0mm + - 0.1 mm)

given length = 2.0mm

scale is divided by one unit = 0.1 mm

uncertainty is measure = + - 0.1

value become (2.0 + - 0.1)

(3, 1.9)