But it doesn’t matter, it has been replaced with the Kibble balance.
The Kibble balance operated by the US National Institute of Standards and Technology.
Credit: NIST
Of course, it may or may not be a step forward. Read more about it here in the article on The Atlantic: https://www.theverge.com/2018/11/13/18087002/kilogram-new-definition-kg-metric-unit-ipk-measurement.
Why isn’t this necessarily a step forward? Why is it?
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