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Title: Manic Metric Monday: Scientists Rethink the Kilogram--
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URL Source: http://newsfeed.time.com/2011/01/24 ... nk-the-kilogram/#ixzz1C4McrMyy
Published: Jan 25, 2011
Author: Nick Carbone
Post Date: 2011-01-25 13:34:01 by gengis gandhi
Keywords: None
Views: 361
Comments: 31
Manic Metric Monday: Scientists Rethink the Kilogram By: Nick Carbone (1 day ago) Topics: kilogram, Mass, measures, metric system, royal society, Science, weights kilo2 Monday kicks off an urgent meeting between some of the greatest minds in science, a debate that could result in a rethinking of the most elemental scientific measurements. Will the kilogram ever be the same? The researchers are gathering at the Royal Society in London to discuss adjusting the fundamental mass of the kilogram. The kilogram is the only unit in the International System of Units (SI) whose measurement is based on a physical object. And anyone who's ever stepped on a scale knows how unkind Father Time can be to a person's weight. Turns out the keepers of the kilo are facing the same problem. (More on TIME.com: See the top 10 amazing scientific discoveries of 2010.) Currently, the kilogram is based on the mass of a platinum-iridium bar stored in a vault in a Parisian suburb. Aside from sounding like it should be the target of a heist in the next crime thriller, scientists estimate the bar's mass may have actually changed by 50 micrograms over the years, which they note is “the mass of a small grain of sand 0.4 mm in diameter.” (More on TIME.com: See a brief history of the periodic table.) The best and the brightest in science will meet to work out a constant on which the kilogram can be based. They anticipate it will be tied to the value of the Planck constant, h, which reflects the size of the smallest particles of physical matter in quantum physics. But don't jump on the scale just yet - there's no set date to officially recalibrate the kilo's mass. (via Royal Society)
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#6. To: gengis gandhi, Original_Intent, all (#0)
This doesn't make any sense. Isn't a kilogram the weight of a litre of water? I doubt they use a physical object to base a measurement so important on. Seriously. What do they base a gram on then? I'm calling bs on this one.
It is based on the kilogram. It is exactly 1/1000th of a kilogram.
It is based on the kilogram. It is exactly 1/1000th of a kilogram. It was more a rhetorical question. I already knew the answer. One could easily argue that a kilogram weighs 1000 grams instead.
A cubic centimeter of water weighs exactly one gram. Metric's funny that way.
a piece of gold in a suburb in Paris lmfao Good Lord grammma hash
#22. To: wudidiz (#18)
Here is a picture of the object used to determine what the mass of a kilogram is.
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#11. To: wudidiz (#6)
What do they base a gram on then?
#16. To: RickyJ (#11)
What do they base a gram on then?
#17. To: RickyJ, All (#16)
#18. To: All (#17)
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