https://www.bbc.com/news/science-environment-46143399
Soon kilogram might not be exactly what it used to be. Scientists plan to change the way the kilogram is defined.
Currently, it is defined by the weight of an aging platinum-based ingot called “Le Grand K” located in Paris.
Many scientists favour of defining a kilogram in terms of an electric current, but some have mixed feelings about the change.
6 Comments
Tomi Engdahl says:
A Vote of Mass Importance: Historic SI Unit Overhaul Redefines Kilogram, Ampere, and More
https://spectrum.ieee.org/tech-talk/at-work/test-and-measurement/a-vote-of-mass-importance-historic-si-unit-overhaul-redefines-kilogram-ampere-and-more
Tomi Engdahl says:
https://xkcd.com/2073/
Tomi Engdahl says:
05/2019: Ampere, kilogram, Kelvin and mol definitions will change
https://www.uusiteknologia.fi/2018/11/19/tata-on-uusi-ampeeri/
Tomi Engdahl says:
http://www.etn.fi/index.php/13-news/8740-kilogramma-ampeeri-kelvin-ja-mooli-menevat-uusiksi
Tomi Engdahl says:
The kg is dead, long live the kg
https://www.youtube.com/watch?v=c_e1wITe_ig
The kilogram, mole, kelvin, and ampere will be redefined by physical constants
The world: we redefined Kg
USA: what’s Kg..?
The pound is actually defined as exactly 0.45359237 kg. So by changing the definition of the kg, you change the pound by default.
Tomi Engdahl says:
https://www.powerelectronics.com/news/sorry-primary-kilogram-we-are-dumping-you?NL=ED-003&Issue=ED-003_20190111_ED-003_26&sfvc4enews=42&cl=article_1_b&utm_rid=CPG05000002750211&utm_campaign=22622&utm_medium=email&elq2=f14b36fab8bd4133bf49f2fa07054d42