It's interesting to trace the convoluted history back for all the standardized measurements. They all have some arbitrary source which we now use in science, technology, engineering, and math. It is truly remarkable that seemingly inaccurate things can lead us to precise results, as long as we stay within the standard system.
Reference Links
Cubit Rod of Maya, royal treasurer of Tutankhamen - 1:24
commons.wikimedia.org/wiki/Fi...
Map of Anglo Saxons circa 600 AD - 1:41
commons.wikimedia.org/wiki/Fi...
King George IV - 2:06
shorturl.at/wyGHU
Mid 19th century tool for converting different standards of the inch - 2:30
commons.wikimedia.org/wiki/Fi...
Hand Loom Weaving - 2:33
commons.wikimedia.org/wiki/Fi...
Hartmann Maschinenhalle 1868 - 2:39
commons.wikimedia.org/wiki/Fi...
Watt Steam Engine
commons.wikimedia.org/wiki/Fi...
Anonymous - Prise de la Bastille - 3:02
commons.wikimedia.org/wiki/Fi...
International prototype of the kilogram aka Le Grand K - 3:11
shorturl.at/lKNR3
Kilometre definition - 3:40
commons.wikimedia.org/wiki/Fi...
Metre Convention Signatories - 4:12
commons.wikimedia.org/wiki/Fi...
Periodic Table - 4:34
commons.wikimedia.org/wiki/Fi...
Krypton Atom Breakdown - 4:41
www.britannica.com/science/kr...
Sine Wavelength - 4:52
commons.wikimedia.org/wiki/Fi...
Engraving of an wyvern-type ouroboros by Lucas Jennis - 5:01
commons.wikimedia.org/wiki/Fi...
Негізгі бет Ғылым және технология How Measurement is Defined by Arbitrary Associations
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