2min chapter

Patented: History of Inventions cover image

Measurements

Patented: History of Inventions

CHAPTER

What Is the Kilogram?

A kilogram itself was always an artifact. There was a lump of metal in a vault in paris called le grande q at, which i remember in a sort of glass belgo. And everything was measured off that bit of metal. So the quite recently, they recalebrated it by using a constant of nature, plank coe. I went over there in 20 18, when they were first they did the official vote on it. Then the sort of changing in the guard happened 20 19.

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