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#381248
Tue 21 Jun 2016 03:56:PM
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Joined: Feb 2001
Posts: 381,903
Launch Director
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Launch Director
Joined: Feb 2001
Posts: 381,903 |
A high-tech version of a balance scale 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 scientific community with the redefinition of the kilogram, an event slated for 2018. Source: Measuring Planck's constant, NIST's watt balance brings world closer to new kilogram
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