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A unit of length used to measure nuclear distances, = 10−15 meter. Named for the Italian physicist Enrico Fermi (1901–1954). Now obsolete, replaced by the SI term femtometer (symbol, fm); 1 fermi = 1 femtometer.
A nail, as a unit of cloth measurement, is generally a sixteenth of a yard or 2.25 inches (5.715 cm). The nail was apparently named after the practice of hammering bras ..more definition+
In relation to the base unit of [length] => (meters), 1 Fermi (fermi) is equal to 1.0E-15 meters, while 1 Nails Cloth (nail) = 0.05715 meters.| 21 Fermi | to common length units |
|---|---|
| 21 fermi | = 2.1E-14 meters (m) |
| 21 fermi | = 2.1E-17 kilometers (km) |
| 21 fermi | = 2.1E-12 centimeters (cm) |
| 21 fermi | = 6.8897637795276E-14 feet (ft) |
| 21 fermi | = 8.2677165354331E-13 inches (in) |
| 21 fermi | = 2.2965879265092E-14 yards (yd) |
| 21 fermi | = 1.3048795036984E-17 miles (mi) |
| 21 fermi | = 2.2196385160131E-30 light years (ly) |
| 21 fermi | = 7.9370088739539E-11 pixels (PX) |
| 21 fermi | = 1.3125E+21 planck length (pl) |