The definition of the kilogram for more than 130 years, the International Prototype of the Kilogram (IPK), a cylinder of a platinum alloy stored at the International Bureau of Weights and Measures (BIPM) in France, will now be retired.
from Top Energy News | Latest Energy Industry Information and Updates: ET EnergyWorld : ETEnergyworld.com https://ift.tt/2FxtLWX
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