Reply to post: Another problrem with the standard ...

Weight, what? The perfect kilogram is nearly in Planck's grasp

John H Woods

Another problrem with the standard ...

... is that, being from 19th C. technology, who knows what's in it? I heard it had shrunk by about 50µg since its manufacture (my guess would be loss of about 1ml of H2 but it could be loss of surface greases)

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