Space measurement {length measurement} {distance measurement} uses distance units. The MKS system has a fundamental length unit {meter, length} (m). Derived length units include 10^-2 meters {centimeter}, 10^-6 meters {micron}, and 10^-10 meters {Angstrom}.
English measure
0.001 inches (mil) measures wire diameter. 2.54 centimeters {inch} (in). 39.37 inch = 1 meter. 0.66 feet {li, length unit}. 3 inches {palm, length}. 4 inches {hand}. 7 to 9 inches {span}. 12 inches {foot, length} (ft). {board foot}. 18 inches to 22 inches {cubit}. 2.5 feet {pace, length}. 3 feet {yard, length} (yd). 6 feet {fathom}. 16.5 feet {rod, measure}. 100 links or 66 feet {chain, length} {Gunter's chain} {surveyor's chain}. 100 feet or 100 links {chain} {engineer's chain}. 625 Greek feet or 0.1196 mile {stade}. 220 yards {furlong}. 5280 ft, 1760 yards, 8 furlongs, or 1.609 kilometers {mile} {statute mile}. 1 arc-minute on great circle of sphere with area equal to Earth area is 6080 feet {nautical mile}. 1 arc-minute at equator is 6087 feet {geographic mile}. 3 miles, or 2.4 to 4.6 miles {league}.
railroad
Railroad track {railroad measurement} has width {standard gauge} {narrow gauge} {HO guage}.
wire gauge
Wires have diameters {wire gauge}, such as American or Brown and Sharpe system.
minimum
By quantum mechanics, minimum length is Planck length, 1.6 * 10^-35 meters, where length becomes quantized.
maximum
Maximum length is circumference of universe, 10^30 meters.
Physical Sciences>Physics>Measurement>Kinds>Space
5-Physics-Measurement-Kinds-Space
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Date Modified: 2022.0224