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kqr
on Oct 14, 2015
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Kilogram conflict resolved at last
Inofficially, it has been. Technically, it's not quite true. Water has a density of 999.97 kg/m³.
seunosewa
on Oct 14, 2015
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That's unfortunate. How did it come to be that way?
lvh
on Oct 14, 2015
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Water is too hard to keep constant, and too hard to reproduce. Keeping it exactly in 1dm3 is tricky, for example. Not for "regular" use, with a few significant digits of course; but when you're defining fundamental physical constants, atoms count.
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