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Old 11-11-2010, 04:01 PM
beowulff beowulff is online now
Join Date: May 2001
Location: Scottsdale, more-or-less
Posts: 15,096
Originally Posted by Simplicio View Post
The chunk of metal used to formally define the Kilogram was machined so that it would be close to the weight of 1,000 cubic centimeters of water at 4 degrees. I'm not really sure why they haven't taken the obvious step of just using that as the definition. Perhaps water doesn't have as fixed a density as I'd think at a set temperature?
The new standard will be a really cool Single-isotope Silicon sphere.