Comments on: Replace the Kilogram!

By: Los problemas del kilo « Entrando en mi mundo…

Los problemas del kilo « Entrando en mi mundo… — Thu, 11 Nov 2010 14:31:15 +0000

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By: _ul_was here

_ul_was here — Mon, 08 Nov 2010 15:46:07 +0000

answer is quite simple : 1Kg is 1.000ml of pure water: ( density of water=1) .
1 liter of water is a cube which measures 10x10x10 centimeters = 1 decimeter cube .
. i’ve lost the definition of the meter ( calculated fraction of the lightspeed), but it can be found easily.
thus , the definition of a Kilogram ( or a gram) is directly relative to the speed of light , wich is supposed to be constant

By: Stuart

Stuart — Thu, 04 Nov 2010 15:28:09 +0000

The reason why a litre of water is no longer used as the standard for the kilogram is because it’s highly inaccurate by today’s standards (though it was initially huge step forward in the time of regional inches, feet, and pounds). The drift between the kilogram artifact masses (~70 micrograms) is a major source of concern regarding the definition of mass. What they’re trying to do is to define the kilogram in the terms of something that is far more accurate (perhaps a thousand times more accurate). The main reason for this is that the uncertainty of the kilogram propagates through all the units based on it (quite a few). Using a litre of water as a basis for the kilogram would be a significant step backward in terms of accuracy; there is too much variability in that definition to achieve the accuracy of the prototype kilogram (and even the prototype kilogram’s uncertainty is undesirable).

By: WilliamB

WilliamB — Thu, 04 Nov 2010 10:36:41 +0000

Why isn’t the International Prototype Kilogram the same as the mass of one liter of water?

By: World’s Strangest | Replacing the Kilogram

World’s Strangest | Replacing the Kilogram — Wed, 03 Nov 2010 20:36:06 +0000

[...] Link | Image: Clipart [...]

By: Tweets that mention Replace the Kilogram! | Surprising Science -- Topsy.com

Tweets that mention Replace the Kilogram! | Surprising Science -- Topsy.com — Wed, 03 Nov 2010 18:50:52 +0000

[...] This post was mentioned on Twitter by Ron Gilbert, Camilo Nieto, S. Eric Rhoads, Celuloide, Claire Bryce and others. Claire Bryce said: RT @grumpygamer: Apparently the kilogram is not really a kilogram anymore, a fact I plan on bring up at the deli today: http://bit.ly/9DMiqN [...]