World's Roundest Object!
The world's roundest object helps solve the longest running problem in measurement -- how to define the kilogram. Support Veritasium on Patreon: http://bit.ly/VePatreon A kilogram isn't what...
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Can I hold it?Only if you promise to be really, really careful.I promise I will be so incredibly careful. I will be incredibly careful with it. I promise.So, it's slippery, be careful. Alright, are we ready?I'm about to touch a 1kg sphere of silicon-28 atoms. There are about 2.15x10^25 of them.It feels absolutely incredible. Wow, that is amazing.Besides its creators, I am one of only a handful of people ever to hold this sphere.The raw material used to make it was worth 1 million Euros but now that it has been soprecisely sculpted --How much is that worth?It's priceless. ... This you are looking at now is the roundest object in the world.How can you say for sure it's the roundest object? I mean the Earth is pretty round,isn't it?...
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Can I hold it?Only if you promise to be really, really careful.I promise I will be so incredibly careful. I will be incredibly careful with it. I promise.So, it's slippery, be careful. Alright, are we ready?I'm about to touch a 1kg sphere of silicon-28 atoms. There are about 2.15x10^25 of them.It feels absolutely incredible. Wow, that is amazing.Besides its creators, I am one of only a handful of people ever to hold this sphere.The raw material used to make it was worth 1 million Euros but now that it has been soprecisely sculpted --How much is that worth?It's priceless. ... This you are looking at now is the roundest object in the world.How can you say for sure it's the roundest object? I mean the Earth is pretty round,isn't it?...
