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Is there any scale in the world that can measure a kilogram to within the accuracy of a microgram? And if you buy a kilogram of something and they accidentally
by jbay808 8y ago
Is there any scale in the world that can measure a kilogram to within the accuracy of a microgram?
And if you buy a kilogram of something and they accidentally short you by a few micrograms, haven't you only overpaid by a few parts per billion? Even on a billion dollar order you've only overpaid by a few dollars...
- zamadatix 8y agoFor your first question some Kibble balances have accuracy parts per billion in measurement of the kilogram. For your second question, agreed - no trade deals care about the accuracy of the new kilogram vs old.
- gus_massa 8y agoI agree that nobody cares for this level of precision in comercial trade, but as a thought experiment ... According to the first result in Google https://brightside.me/wonder-curiosities/the-16-most-expensive-materials-in-the-world-188955/ https://brightside.me/wonder-curiosities/the-16-most-expensi... > 1. Antimatter — $62.5 trillion per gram > 2. Californium — $25-27 million per gram So the difference is a few dollars per milligram of antimatter, and less than a cent per kilogram of Californium. From https://en.wikipedia.org/wiki/United_States_Bullion_Depository https://en.wikipedia.org/wiki/United_States_Bullion_Deposito... > As of November 2017, Fort Knox holdings are 4,582 metric tons (147.3 million oz. troy), with a market value of over $100 billion. So the difference is a few hundred dollars.