International System of Units overhauled in historic vote

International prototype of the kilogram

All modern mass measurements are derived from the kilogram, whether micrograms of pharmaceutical medicine or gold dust, kilos of fruit or fish, or tonnes of steel.

Untill now, the kilogram is defined as the being equal to the mass of the International Prototype of the Kilogram (IPK), a cylinder of a platinum alloy stored at the BIPM in France.

"We know from comparing the kilogram in Paris with all the copies of the kilogram that are all around the world that there are discrepancies between them and Le Grand K itself", Dr Stuart Davidson, head of mass spectrometry at the National Physical Laboratory in the United Kingdom told the BBC.

For 130 years, a kilogram has been defined by a lump of metal sitting in a vault in Paris. The update will take effect May 20. Scientists at the meeting were giddy with excitement: some even sported tattoos on their forearms to mark the moment.

The real prototype is-and will continue to be-kept in Paris at the International Bureau of Weights and Measures (BIPM), the arbiter of global measurement standards since the Meter Convention in 1875.

Nobel Prize-winning American physicist William Phillips called the update "the greatest revolution in measurement since the French revolution", which ushered in the metric system of metres and kilogrammes. Scientists want to keep studying them to see whether their masses decay over time.

More news: Federer crashes to Nishikori in opener

The change will have no discernible impact for most people. Rather than basing the unit on this physical object, henceforth, the measurement will be based on a fundamental factor in physics known as Planck's constant.

Unlike a physical object, the new formula for the kilo, now also known as "the electric kilo", can not pick up particles of dust, decay with time, or be dropped and damaged. This will result in a more democratic system and that is something we can definitely get behind! "We're in chaos", said Barry Inglis, a scientist from Australia.

Bathroom scales won't suddenly get kinder when the definition of a kilogram changes. "This will pave the way for far more accurate measurements and lays a more stable foundation for science".

Quantum phenomena that are identical everywhere are already used to define the second, which is the SI unit for time, and the meter, the SI unit for distance. He said Friday's gathering "was just leaving me in a puddle of tears".

Other SI units with new definitions include the mole, kelvin, ampere, and candela. The kelvin will be based on quantum-level measures of atomic motion and will be tied to the Boltzmann constant that relates an object's energy to its temperature, as well as on the Planck and cesium frequency constants; while the mole will be based on an improved value for Avogadro's constant.

At the General Conference on Weights and Measures (yes, this is a real thing), in Versailles, scientists from more than 50 nations weighed in on the historic vote. "This is the most important decision that the BIPM has made in maybe 100 years, which may be a slight exaggeration, but at least since 1960 when they adopted the International System of Units", Terry Quinn, emeritus director of the BIPM, told Engadget last year. Very rarely have they seen the light of day.

Related News:



Most liked

Devil May Cry will join Adi Shankar's Castlevania television show universe
This new show will be set in the same multiverse as Castlevania , which could lead to some interesting crossovers down the line. It's a freakish idea for sure, and some are quick to point out that a Devil May Cry anime series has already been made.

DeSantis: No reaction to race he declared 'over'
State officials ordered a manual recount on Thursday after a machine recount showed that Republican Gov. The US Senate race recount in Florida is still undecided, with a hand recount still underway.

Trump denies questioning VP's allegiance, says Pence is '100% loyal'
The President also said Pence's loyalty has been tested in many ways, and he couldn't be happier with his pick for Vice President. President Trump pushed back on what he called a "phony story " that he harbors doubts about Vice President Mike Pence's loyalty.

Senate Judiciary chair Grassley's move leaves key opening
Grassley's move also opens up a slot for a new Judiciary panel chairman, likely South Carolina's Lindsey Graham . Grassleypreviously served as chairman of the Senate Finance Committee in 2001 and again from 2003 to 2007.

Lewis Hamilton says he can be even better in 2019
It won't make a difference anyway, because he will continue to take risks and drive the way he drives, but he will learn. Victory in Brazil ensured they have equalled Ferrari's record, achieved with Michael Schumacher between 2000 and 2004.

Zion Williamson takes flight from the moon on alley-oop dunk
Reddish said that putting the Kentucky win in the past and moving on was "definitely tough" but that "we can't dwell on any win". Two dribbles, a pass up court, a lob, and in a matter of seconds, the Blue Devils have scored and put momentum on their side.

Bhad Bhabie attacks Iggy Azalea at Cardi B’s FashionNova event
In it, she raps "Bitch don't compare me to Iggy/That old hoe is washed, And I'm lit/Wouldn't pay her to wash up my whip". Anyway, good night. "Glad u left with a bag cuz u certainly ain't making money from music anymore", she wrote.

Hailey Baldwin is Mrs Justin Bieber now
Meanwhile, the move comes after Hailey filed documents to trademark the name Hailey Bieber , following her marriage to Justin. At the time, Hailey's uncle Alec Baldwin claimed his niece and the "Sorry" hitmaker had "just went off" and got married.

Global oil market to lapse into surplus in 2019
And remember, those waivers last only six months; after that, Iranian exports are very likely to drop even further. However much the USA waivers impacted market sentiment, Iran sanctions are still not nothing in real terms.

Hodeidah's embattled civilians on a knife-edge as Security Council discusses Yemen
Nearly 18 million people are considered hungry and 8.4 million severely hungry in Yemen, whose population is 29 million. He said he saw children who were "skin and bones" dying in hospitals that did not have the capacity to care for them.

French protester killed in accident at anti-fuel tax blockade
Many drivers see them as emblematic of a presidency seen as disconnected from day-to-day economic difficulties. The Interior Ministry said about 125,000 protesters were involved in 2,000 demonstrations around France.

North Korea to Expel US Citizen Detained for Illegally Entering State
It marked the first official report of a weapons test by North Korea since it began the delicate diplomatic process with Washington.

Global hotel chains apologise for unhygienic practices
The housekeeper then takes the same sponge and cleans the toilet, according to text shown in the video. The Park Hyatt in Beijing called the incidents shown an "isolated occurrence", AP said.

Sony celebrates Playstation 4 5th anniversary
The following deals are for U.S. and Canada only and will be available from participating retailers. This post contains affiliate links where DualShockers gets a small commission on sales.

One in six NHS posts unfilled by 2030
To put it in perspective, 350,000 people is more than the population of Coventry. The briefing sets out five tests for the NHS Long Term Plan.