Standard Kilogram
- From: "Ian Macmillan" <iandmac@xxxxxxxxxx>
- Date: Wed, 19 Sep 2007 16:31:41 +0000 (UTC)
The recent report about a 50ug discrepancy in the comparison of the standard
1 Kg mass with its copies led me to wonder how such precision is attained,
50ug being 5 x 10^-9 Kg.
Can anyone describe the method of making such a comparison, and how the
degree of confidence in the result is estimated?
All the best
Ian Macmillan
.
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