Author Topic: The Kilogram Is Getting Fat  (Read 237 times)

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Offline Justin Kissel

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The Kilogram Is Getting Fat
« on: January 16, 2013, 01:39:39 AM »
Standard Kilogram Needs Trimming

How do you define one kilogram? Easy: it's the exact mass of a metal cylinder called the International Prototype Kilogram, IPK for short, kept in controlled conditions in France. But the standard kilogram has gained weight since its creation in 1875. To trim it and its many replicas down to size, we need to clean them. The report is in the journal Metrologia...
« Last Edit: January 16, 2013, 01:40:03 AM by Asteriktos »