Nobody's Exactly Sure How Much A Kilogram Is Right Now
发布时间 2016-06-27 15:03:10 来源
摘要
Yes, it's only micrograms of difference, but it's still really weird: until 2018, the kilogram is defined as "the weight of this physical object". So what happens when that object changes?
Thank you to everyone at the National Physical Laboratory! You can visit them at http://npl.co.uk
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