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How the Kilogram Was Defined !
1:39
YouTubeTQQ
How the Kilogram Was Defined !
Explore the surprising history of the kilogram, from stones and water to a platinum-iridium cylinder and finally to quantum physics. This short dives into the metric system’s origins, the International Prototype Kilogram, why a physical artifact failed, and how the 2019 redefinition tied mass to the Planck constant using the Kibble balance ...
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