TV News LIES

Sunday, May 24th

Last update07:34:32 PM GMT

You are here News Science Scientists fear kilograms don't weigh as much as they used to

Scientists fear kilograms don't weigh as much as they used to

Kilogram may be losing weightWhen is a kilogram not a kilogram? When it starts to weigh less. It came into existence more than two centuries ago and has become the standard unit of weight around the world, from the shopping malls of Europe to the souks of the Middle East, but scientists believe that the reign of the kilo as we know it is about to come to an end.

A group of experts meeting in London today want to redefine the kilogram so that it is no longer based on the mass of a solid cylinder of platinum-iridium alloy that sits beneath three layers of protective glass sealed in a locked vault in Sèvres, France.

This metal block, known as the International Prototype Kilogram, has been used since it was first registered with the International Bureau of Weights and Measures (BIPM) in 1889 as the definitive unit of mass against which all other kilograms are measured.

In the past 122 years, it has been brought out of storage just three times to calibrate the national prototype kilograms used by countries around the world. However, scientists now believe it is time to redefine the kilogram because there is evidence that the precise mass of the international prototype in Sèvres is not as constant as it should be.

"We think it is losing weight, and we don't know why," says the BIPM's Michael Stock, who is due to attend the meeting at the Royal Society in London that will look again at the kilogram. "From the three times we have had it out to make calibrations, we have had indications that it is not perfectly stable. It seems to have lost about 50 micrograms and there is no real explanation."

More...


Most Recent Related Stories...


Oldest stone tools pre-date earliest humans

Oldest stone toolsThe world's oldest stone tools have been discovered, scientists report.  They were unearthed from the shores...

Far out, man: 13.1bn-year-old galaxy is most distant yet seen by humans

13bn year old galaxyA team of astronomers has measured a galaxy farther than any other ever seen by human...

Hubble telescope details halo surrounding Andromeda galaxy

AndromedaThe massive halo of gas that surrounds the Andromeda Galaxy, the Milky Way's nearest neighbor, is...

Cosmic rays may damage brains of astronauts

Cosmic raysIt may not be space debris, errant asteroids, supply shortages, thruster malfunctions or even the malevolent...
 
America's # 1 Enemy
Tee Shirt
& Help Support TvNewsLIES.org!
TVNL Tee Shirt
 
TVNL TOTE BAG
Conserve our Planet
& Help Support TvNewsLIES.org!
 
Get your 9/11 & Media
Deception Dollars
& Help Support TvNewsLIES.org!
 
The Loaded Deck
The First & the Best!
The Media & Bush Admin Exposed!