Linear Equivalents:
1 micron = .0000394 inches
25,400 microns = 1 inch
1,000 microns = 1 millimeter
Micron Size Comparisons:
Radius of a hydrogen atom = 0.00005 microns
Bacteria = 2 microns
Diameter of a red blood cell = 8 microns
Talcum powder = 10 microns
Diameter of a white blood cell = 25 microns
Naked-eye visibility threshold = 40 microns
Pollen = 60 microns
Diameter of a human hair, typical human = 70 microns
Table salt = 100 microns
Openings in window screen, typical screen = 1475 microns
(or .058 inches)
Distance needed for first down in football, “1st and ten” = 9,144,000 microns
Distance needed for first down in football, after false start penalty = 13,716,000 microns
Distance needed for first down in football, after holding penalty = 18,288,000 microns
Highest elevation, Mt. Everest = 88,54,000,000 microns
Distance to the moon = 384,400,000,000,000 microns
Conversions:
1 cubic cm = .06102 cubic inches
1 cubic foot = 1,728 cubic inches
1 cubic foot = 7.48 gallons
1 cubic foot water = 62.42 lbs.
1 gallon = 3,785 cubic cm
1 gallon = 231 cubic inches
1 gallon water = 8.34 lbs.
1 gallon/min = .002228 cubic ft./sec
1 kg/sq. meter = .2048 lbs./sq. ft.
