Author Topic: One Step Closer to New Kilogram  (Read 9997 times)

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Offline Crazy Horse

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One Step Closer to New Kilogram
« on: July 12, 2016, 11:08:02 AM »
NIST’s Newest Watt Balance Brings World One Step Closer to New Kilogram

June 21, 2016

Contact: Chad Boutin

A high-tech version of an old-fashioned balance scale at the National Institute of Standards and Technology (NIST) has just brought scientists a critical step closer toward a new and improved definition of the kilogram. The scale, called the NIST-4 watt balance, has conducted its first measurement of a fundamental physical quantity called Planck’s constant to within 34 parts per billion – demonstrating the scale is accurate enough to assist the international community with the redefinition of the kilogram, an event slated for 2018.

Rest of the article at the link.

As someone in the metrology field, this is rather interesting.
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Offline obumazombie

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Re: One Step Closer to New Kilogram
« Reply #1 on: July 12, 2016, 12:10:33 PM »
If this is at the level of quantum physics including the application of planks constant, I wish they would make it more understandable to the layperson by putting the kilo in terms of a ratio to Avogadro's number and a standard corresponding element. 
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