4 ms·
I was fascinated by the formal re-definition of Kilograms in 2018 by General Conference on Weights and Measures (CGPM) A kg is now tied to the Planck constant
by jimmySixDOF 6y ago
I was fascinated by the formal re-definition of Kilograms in 2018 by General Conference on Weights and Measures (CGPM)
A kg is now tied to the Planck constant so - basically now involves a unit measure of time (/second) to calculate.
- dahfizz 6y agoYup, the second is officially 9192631770 oscillations of a cesium atom. How convenient!
- jasomill 6y agoEven more convenient is the metre, defined as the distance travelled in one such second by light in a vacuum divided by 299,792,458, and "only within a spatial extent sufficiently small that the effects of the non-uniformity of the gravitational field can be ignored."