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The x unit (symbol xu) is a unit of length approximately equal to 0.1 pm (10−13 m). It is used to quote the wavelength of X-rays and gamma rays.
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.
In relation to the base unit of [length] => (meters), 1 X Unit (xu) is equal to 1.002004E-13 meters, while 1 Fermi (fermi) = 1.0E-15 meters.| 2121258640 X Unit | to common length units |
|---|---|
| 2121258640 xu | = 0.00021255096423146 meters (m) |
| 2121258640 xu | = 2.1255096423146E-7 kilometers (km) |
| 2121258640 xu | = 0.021255096423146 centimeters (cm) |
| 2121258640 xu | = 0.00069734568317407 feet (ft) |
| 2121258640 xu | = 0.0083681481980888 inches (in) |
| 2121258640 xu | = 0.00023244856105802 yards (yd) |
| 2121258640 xu | = 1.3207304605569E-7 miles (mi) |
| 2121258640 xu | = 2.246601461066E-20 light years (ly) |
| 2121258640 xu | = 0.80334232822501 pixels (PX) |
| 2121258640 xu | = 1.3284435264466E+31 planck length (pl) |