When we buy a kg of flour how do we really know that we’re getting a kilogram? Scientists at CSIRO are working on developing the perfect kilogram from a sphere of pure silicon and are within 35nm from perfection. A piece of fine hair accidentally dropped into a kg of flour would not be registered on the average scales, but would add a massive 50,000nm to the diameter of the CSIRO kilogram sphere. This work really is precision engineering at the nanoscale!
- 15/06/2007 -
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