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Topic

International Prototype Kilogram

3 mentions in 1 episode

The physical kilogram standard known as Le Grand K, whose weight the hosts compare with replica standards.

Mentions

273: Hacky Hack Hack

  • 55:15

    known as the International Prototype Kilogram or Le Grand K

  • 55:32

    it was found to be 0.05 milligrams about the weight of a grain of sand lighter than its copies

  • 56:29

    they're trying to figure out a way to do this that isn't based on one thing