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scotchmi_st
on Oct 26, 2013
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The kilo is losing weight, changing all of science
I'm not sure I understand: surely we can just say that one kilo is a certain number of carbon 12 atoms, and have done? Would seem sensible to me.
PeterisP
on Oct 26, 2013
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In order to make practical use of that (i.e., calibrate a weight-measurement-tool) you need to be able to somehow make an artifact with that certain number of carbon 12 atoms, or measure the count of atoms with a sufficient accuracy.
mdturnerphys
on Oct 26, 2013
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It's a standard, yes, but it's really hard to reproduce.
logicallee
on Oct 26, 2013
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OK - how many?
Leszek
on Oct 26, 2013
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Presumably 6.0221413 * 10^23 * 1000 / 12 = 5.0184511 * 10^25
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