somebody knows what is the current standard of the kilogram or of the second?

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somebody knows what is the current standard of the kilogram or of the second?

plzz i have chemistry class and thats my homework but i dont find it.. i look for it in google.. but i dont find it either...
if somebodys knows plz tell me..
a lot of thankz..

2007-09-03 09:09:08 · 2 answers · asked by K!R@ 2 in Science & Mathematics ➔ Mathematics

2 answers

The kilogram standard is the equivalent mass of the International Prototype Kilogram, that is a cylinder of platinum-iridium that is on the International Bureau of Weights and Measures, in Sèvres, France.

The standard of a second is defined as the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium-133 atom.

2007-09-03 09:32:33 · answer #1 · answered by chipdeutsch 4 · 0⤊ 0⤋

Try these sites:

2007-09-03 16:23:33 · answer #2 · answered by 037 G 6 · 0⤊ 0⤋