On Thursday 03 March 2005 18:03, John Woelflein wrote:
> I sent Rachel a reply, asking why she said "2.2 pounds" instead of "1000
> grams." I also said that the kilogram is not defined by pounds; the pound
> is defined by the kilogram. I'll let you know if I hear any reply.
If I had written the article, I'd have given the height - all kilograms are
about 2.2 pounds, but a kilogram of PtIr is smaller than a kilogram of water.
How hard would it be to make an octahedral or cubic diamond about one gram,
and measure its size? That might be a workable way to get a known number of
carbon atoms, and since a mole of carbon is defined to be twelve grams, such
a definition of the gram wouldn't depend on measuring the ratios between two
atomic masses.
phma
--
Without glasses, I can't even distinguish smells...
-Les Perles de la m�decine
