Saturday, 5 January 2019

Weights and measures


An interesting post from ISO:

“The world’s scientific community is making a fundamental change in how we measure things by redefining the kilogramme, the kelvin, the ampere and the mole, four of the seven base units of the International System of Units (SI). An ISO and IEC series of standards plays a crucial role.

Did you know that the humble kilogramme has, until now, been defined by an object that weighs… one kilogramme? And that the measurement unit of temperature – the kelvin – is based on an intrinsic property of water? While this has worked for centuries, the world’s leading scientists have found that, over time, these definitions have been shown to not be 100 % stable. So, today, they formally agreed that all of the measurement units will now be defined by constants of nature rather than physical objects – the biggest change in international measurement since 1875.”

For the full post see: https://www.iso.org/news/ref2348.html

Posted by Dr. Tim Sandle, Pharmaceutical Microbiology

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