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A rack unit (abbreviated U or RU) is a unit of measure defined as 1.75 inches (44.45 mm). It is most frequently used as a measurement of the overall height of 19-inch and ..more definition+
The Bohr radius (a0 or rBohr) is a physical constant, approximately equal to the most probable distance between the proton and electron in a hydrogen atom in its ground state. It is named after Niels Bohr, due to its role in the Bohr model of an atom. Its value is 5.2917721067×10^−11 m.
In relation to the base unit of [length] => (meters), 1 Rack Unit (ru) is equal to 0.04445 meters, while 1 Bohr Radius (Bohr) = 5.29177E-11 meters.| 3939433439 Rack Unit | to common length units |
|---|---|
| 3939433439 ru | = 175107816.36355 meters (m) |
| 3939433439 ru | = 175107.81636355 kilometers (km) |
| 3939433439 ru | = 17510781636.355 centimeters (cm) |
| 3939433439 ru | = 574500709.85417 feet (ft) |
| 3939433439 ru | = 6894008518.25 inches (in) |
| 3939433439 ru | = 191500236.61806 yards (yd) |
| 3939433439 ru | = 108806.9526239 miles (mi) |
| 3939433439 ru | = 1.8508383507404E-8 light years (ly) |
| 3939433439 ru | = 661824901131.52 pixels (PX) |
| 3939433439 ru | = 1.0944238522722E+43 planck length (pl) |