Comment on NIST to redefine the kilogram based on a fundamental universal constantparentComments−msimpson9yIt's how the mass of the International Prototype Kilogram and its copies have drifted over time:http://www.bipm.org/en/bipm/mass/ipk/ (verifications tab)
Comments
It's how the mass of the International Prototype Kilogram and its copies have drifted over time:
http://www.bipm.org/en/bipm/mass/ipk/ (verifications tab)