- 2,728
- 2,212
Today is the day the new definition of the Kilogram based on the Kibble balance (aka Watt balance) and Plank's constant takes affect.
The new definition of the kilogram, effective today, is based on the Kibble balance and Planck's constant. This shift signifies a move away from physical artifacts to a definition rooted in fundamental constants of nature. The change impacts institutions like the BIPM in Paris, where traditional methods of measurement are now obsolete. Celebratory activities among forum members included personal fitness routines, reflecting a lighthearted acknowledgment of this scientific milestone.
PREREQUISITESScientists, metrologists, educators, and anyone interested in the evolution of measurement standards and their implications in science and technology.


I swam laps for a long time (3x15 minute intervals) with intervening soaks in a hot spa.jtbell said:I celebrated by going for a long walk this morning to try to shed one of my spare kilograms.
I suppose this means that the official kilogram cleaner at the BIPM in Paris is now out of a job.![]()