Convert femtometer to span (cloth)
Please provide values below to convert femtometer [fm] to span (cloth) [span], or Convert span (cloth) to femtometer.
How to Convert Femtometer to Span (Cloth)
1 fm = 4.37445319335083e-15 span
Example: convert 15 fm to span:
15 fm = 15 × 4.37445319335083e-15 span = 6.56167979002625e-14 span
Femtometer to Span (Cloth) Conversion Table
| femtometer | span (cloth) |
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Femtometer
A femtometer is a unit of length in the metric system equal to 10^-15 meters. It is also known as a fermi.
History/Origin
The prefix "femto-" for 10^-15 was adopted by the CGPM (General Conference on Weights and Measures) in 1964. The unit is also named after the physicist Enrico Fermi.
Current Use
The femtometer is primarily used in nuclear physics to measure the size of atomic nuclei.
Span (Cloth)
A span is an obsolete unit of length, typically about 9 inches, based on the distance between the tip of the thumb and the tip of the little finger when the hand is fully extended.
History/Origin
The span has been used as a unit of measurement for thousands of years in many different cultures.
Current Use
The span is no longer a standard unit of measurement.