veritasium

NEW VIDEO! The kg is finally being redefined! (Patreon)

Published:

2018-11-15 19:28:17

Imported:

2026-06

Tags:

kg new si si units

Content

I feel like I've been waiting for this moment for six years or so. As of tomorrow (assuming a vote goes to plan) the kg will no longer be the mass of a metal cylinder.

Along with the kg, the kelvin, mole, and ampere will all get tweaks to tie them to fundamental constants.

Files

The kg is dead, long live the kg

The kilogram, mole, kelvin, and ampere will be redefined by physical constants. For a limited time, get 3 months of Audible for just $6.95 a month: http://audible.com/VERITASIUM or text VERITASIUM to 500500 Will this be the last video I make about SI units? Quite possibly. There's something about being so precise and defining the systems within which science works. When we can more accurately and routinely measure a kilogram, a mole, a kelvin and an ampere, then we can make better observations, we can better detect anomalies and improve our theories. That is why this is so important to me. Special thanks to Patreon supporters: Donal Botkin, Michael Krugman, Ron Neal, Nathan Hansen, James M Nicholson, Terrance Shepherd, Stan Presolski Special thanks to NIST: http://nist.gov Additional graphics by Ignat Berbeci Music from http://epidemicsound.com "Experimental1"