File:International_prototype_of_the_kilogram_aka_Le_Grand_K.jpg
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Summary
DescriptionInternational prototype of the kilogram aka Le Grand K.jpg |
English: The International Prototype Kilogram, aka Le Grand K or the Big K or IPK stored in a vault in Paris was replaced by Planck's constant in 2019. The IPK was losing mass so the metrology community redefined the kilogram with the Planck constant. |
Date | |
Source | https://www.nist.gov/si-redefinition/kilogram |
Author | BIPM |
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Items portrayed in this file
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3 September 2019
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 14:49, 5 May 2022 | 1,217 × 1,512 (246 KB) | WalkingRadiance | Uploaded a work by J. Lee/NIST from https://www.nist.gov/sites/default/files/styles/2800_x_2800_limit/public/images/2018/05/14/kilograms-pml0013.png?itok=hOXPUON0 and https://www.nist.gov/si-redefinition/kilogram with UploadWizard |
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