The Kilogram Is No Longer Valid, U.S. Argues

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October 30, 2010 at 9:28 am #2057

LPH

The Kilogram Is No Longer Valid, U.S. Argues

The precise weight of the kilogram is based on a platinum-iridium cylinder manufactured 130 years ago; it’s kept in a vault in France at the International Bureau of Weights and Measures. Forty of the units were manufactured at the time, to standardize the measure of weight.

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