Le Grand K: Definition Of The Kilogram Is About To Change
Currently, the mass of the kilogram is decided by the mass of le grand K, a 129-year-old platinum–iridium cylinder that sits under several nested bell jars at the International Bureau…
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Currently, the mass of the kilogram is decided by the mass of le grand K, a 129-year-old platinum–iridium cylinder that sits under several nested bell jars at the International Bureau…