With a reticle under the microscope.
.75 diameter? What units? 0.75 microns? 0.75 kilometres?
Azotobacter's cells are large rods, at least 2 microns in diameter
Microns are a linear measure. Daltons are a measure of mass. As a result, these measurements should not be convertible. In order to equivalize these measurements it would be necessary that they be both of the same genre.
A prokaryote is a class of bacteria. Prokaryote are around 1 micron in diameter , eukaryotes are around the times bigger so the diameter is 10 microns.
One type, Fuso-bacterium nucleatum, as an example is said to be 5 to 10 microns long, just under 1 micron in diameter; and occur in colonies of about 1 mm. 25400 microns per inch.
For the diameter of hair the best unit is micrometre.
You should clarify what you want to measure about it: its diameter, mass, weight, color, etc. If you want to measure its diameter, that would usually be specified in microns (= micrometers).
0.00625 millimeter = 6.25 microns
There are 1,000 microns in a millimetre, taking a pin head of 1mm diameter then it must be 1,000 microns across.
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).
Bacterial prokaryotic cells are about 1-2 microns in diameter and 10 microns long.
First decide what you want to measure about the virus: its diameter, its volume, its mass, etc.
.75 diameter? What units? 0.75 microns? 0.75 kilometres?
It depends on whether the diameter is 11.5 inches, feet, miles, metres, microns, ...
Azotobacter's cells are large rods, at least 2 microns in diameter
You have odd units. Microns is a measurement of distance (micrometer) Inch is a measurement of distance. 25400 microns in an inch. Edit: You just answered the question, a micron is also a measure of pressure just like an inch of mercury is a measure of pressure. So 1 inch of mercury is equal to 25400 microns of mercury.
At low power on the compound microscope, the diameter of the field of view is 4 millimeters. This is reduced to 1.7 millimeters when you switch to medium power and further reduced to 0.4 millimeters when you switch to high power. Covert the measurment for the field of view from millimeters to microns, the conventional unit of measurment in microscopy. There are 1000 microns in one millimeter. Low power: 4mm= 4,000um Medium power: 1.7mm= 1,700um High power: 0.4mm= 400um