- Joined
- Feb 1, 2015
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- 9,646
I had carpal tunnel surgery three days ago so I have to cool my heels watching You Tube videos for a week or so.
I ran across this one. It starts out kind of slow but gets interesting about half way through.
The silicon sphere at the end is the roundest object on the planet. It's purpose is to become a candidate for a new definition of the kilogram. For those that might be interested, here is the link to the work leading up to the manufacture of that sphere.
I ran across this one. It starts out kind of slow but gets interesting about half way through.
The silicon sphere at the end is the roundest object on the planet. It's purpose is to become a candidate for a new definition of the kilogram. For those that might be interested, here is the link to the work leading up to the manufacture of that sphere.