Slashdot Mirror
Domain: bipm.fr
Stories and comments across the archive that link to bipm.fr.
Stories · 1
-
Exactly One Kilogram Of Silicon
Ed Pegg Jr writes "You may know of the importance of 299792458 for length, and 9192631770 for time. However, the official standard for weight is still a block of platinum/iridium made a hundred years ago. A group of scientists from the Avogadro Project are hoping to change that, though, by producing a perfect sphere of ultrapure silicon."