World's Roundest Object!

Name: World's Roundest Object!
Uploaded: 2013-03-25T00:00:00.000Z
Duration: 11 min 43 s
Description: The world's roundest object — a 1kg sphere of pure silicon-28 — was built to free the kilogram from an unstable physical artifact in Paris by counting atoms to redefine mass as a fixed constant.

Veritasium · 11:43 · Watch on YouTube

The world's roundest object — a 1kg sphere of pure silicon-28 — was built to free the kilogram from an unstable physical artifact in Paris by counting atoms to redefine mass as a fixed constant.

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