Units aren't used to measure anything. After you complete the measurement,
using equipment suited to the purpose, you use units to describe the result of
your measurement, and to tell other people about it. I would measure the thickness
of a hair using a micrometer, and express the result in millimeters.
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Mm
Millimetres, as in 1.5 mm. You could use a micrometer to measure thickness of a coin.
In ordinary circumstances, a millimetre, but if you are designing a minting machine, then a micrometre,
The answer will depend on what you wish to measure: the length, thickness, mass, hardness etc.The answer will depend on what you wish to measure: the length, thickness, mass, hardness etc.The answer will depend on what you wish to measure: the length, thickness, mass, hardness etc.The answer will depend on what you wish to measure: the length, thickness, mass, hardness etc.
Radius or diameter in inches or cm. thickness in thousandths or hundredths of an inchor mm.