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Originally Posted by frogesque
nutant gene 71 wrote:
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I'll see if I can better explain this above later, when have some free time. The kilogram is always referenced back to one cubic decimeter of water, so the mass is always the same, only how we measure this mass in terms of the G where it is. More later...
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I beg to differ. NPL: Frequently asked questions - mass and density
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Any better ideas on a postcard please.
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Correct, cubic decimeter of water is not longer used, which has been replaced by a high controlled environment platinum-irridium rod, where the accumulated molecules are carefully cleaned off periodically. My reference was to the original idea behind what represented the mass of one kilogram. If you look up historical references to the kilogram, you'll see what I mean.
A "kilogram" is a scalar, arbitrarily chosen unit of mass. Here's a reference:
http://physics.nist.gov/cuu/Units/kilogram.html