MEASUREMENTS

Gaithersburg, Maryland - November 09, 2018: National Institute of Standards and Technology scientists Dr. Robert Vocke, Physical Scientist in the Mass Spectrometry Group, left, and Dr. Savelas Rabb, research chemist, have, right, have used the Avogadro Constant to redefine the mole, using a mass spectrometer (background), a 1kg silicon crystal sphere, and a lot of equations.

Scientists at the National Institute of Standards and Technology have helped improved methods for definitively measuring a kilogram. Representatives from 57 countries will vote at the General Conference on Weights and Measures in Versailles, France to redefine four basic units of measurement November 16, 2018.

CREDIT: Matt Roth for The New York Times
Assignment ID: 30226894A

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Gaithersburg, Maryland - November 09, 2018: National Institute of Standards and Technology scientists Dr. Robert Vocke, Physical Scientist in the Mass Spectrometry Group, left, and Dr. Savelas Rabb, research chemist, have, right, have used the Avogadro Constant to redefine the mole, using a mass spectrometer (background), a 1kg silicon crystal sphere, and a lot of equations. <br />
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Scientists at the National Institute of Standards and Technology have helped improved methods for definitively measuring a kilogram. Representatives from 57 countries will vote at the General Conference on Weights and Measures in Versailles, France to redefine four basic units of measurement November 16, 2018. <br />
<br />
CREDIT: Matt Roth for The New York Times<br />
Assignment ID: 30226894A