1 micron = 10^(-6) metres.
1 millimetre = 10^(-3) metres = 10^3 x 10^(-6) metres = 10^3 microns = 1000 microns.
Thus 0.1 millimetres = 0.1 x 1000 microns = 100 microns.
One millimeter is MUCH wider than a human hair. About 20 human hairs equals 1 millimeter.
One micron is one millionth of a meter, or 1/8th the width of a human hair. The measurement is used to determine particles in an air stream. Therefore 140 microns would be 140 millionths of a meter. For more details, Google ''Define: Micron''
Whatever it is, if it measures 1,000th of a millimeter wide, it is 1 micron wide. Examples of some small measurements: A typical human hair is 100 microns wide (a 1/10th of a millimeter). A red blood cell is 7 microns wide (less than 1/100th of a millimeter). Here's a neat interactive video of small things for you: http://www.cellsalive.com/howbig.htm A staphylococcus bacteria in the video looks to be just under 1 micron wide. Most viruses are much, much smaller still!
Human hair varies in size greatly. A child's head hair can be as fine as 0.05mm. An adult's head hair can be as course as 0.25mm. Adult eye- brow hair can be as thick as 0.3mm. Hair is circular in shape, not flat like grass. Things which are circular or round in shape, do not have 'thickness', they have 'diameter'.The sizes above express the Diameter of Hair. In the Imperial system of measure, human hair varies between 0.002 inch & 0.010 inch Diameter.
It Doesn't As: X=2.5cm which is 2000 times the length of the width of on and that is too small for the human.
This is estimated to be 100 microns. There are 1000 microns in a millimetre. So in millimetres, a human hair is approx 0.1 millimetres in width.
100 Micron100 Micron's = 0.1 millimeter, about the width of a human hair.
the diameter of human hair varies from about 40 microns to 120 microns. a micron or micrometer is a millionth of a meter. Copy paper thickness is about 100 microns (or 0.1 millimeter).
For the diameter of hair the best unit is micrometre.
The length of a strand of human hair can vary greatly depending on the person. However, the width of a human hair, in terms of how big it is, can measure anywhere from 40 microns to 120 microns. A micron is 1 millionth of a meter.
Diatoms are microscopic. Diatoms range in size from about 2 microns to about 500 microns or equal to the width of a human hair.
While I was working in a cleanroom, I was always told that it was 50 microns (1/20 of a millimeter). However, I've heard numbers ranging from 20 µm to 100 µm.
a millimeter
Eighteen thousandths of a millimeter. 0.0018 cm = 0.018 mm = 18 µm (micrometer) Human hair width actually ranges from 17 to 181 µm. 181 µm is almost .2 mm so you could say "about a fifth of a millimeter for coarse hair"
One millimeter is MUCH wider than a human hair. About 20 human hairs equals 1 millimeter.
The width of a human hair is 0.0018 cm.
The smallest wire on a chip is measured in microns. Current chips have wires that are less than one micron wide, while a human hair is about 100 microns thick.