Question

Which unit is the best one for measuring the thickness of a piece of paper?




mg



mm





mL



ms

Answer 1

millimeter

Answer 2

Thickness is a distance, hence mm is the only possibility, as
mg is a measure of mass, milligram
mL is a measure of volume usually of a liquid, milliliter
ms is a measure of time, millisecond.

Answer 3

millimeter, or mm, because it is measuring an objects length, and everything else would not be measuring an object, but time, liquid, and then mass

Answer 4

\[\mu m\]