How We're Redefining the kg
Veritasium · 3 HN recommendations
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Veritasium explains why the kilogram is being redefined in terms of Planck's constant rather than a physical metal artifact. It visits NIST to show the Kibble balance and why measuring mass precisely is hard.
Why HN recommends it: Praised as an excellent, accessible account of why the kilogram's definition changed, in redefinition threads.
“I found the Veritasium video to be a bit more interesting for the "why" aspect of this change” Read on HN ↗