Members of the BIPM, which groups some 60 nations, agreed on Friday after a week-long meeting at the nearby Palace of Versailles to redefine a kilogram in terms of a tiny but unchanging value called the "Planck constant".
from Zee News :Sci-Tech https://ift.tt/2PBcOPZ
Monday, November 19, 2018
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» How much does a kilogram weigh? Depends on your 'Planck constant'
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