is en en en en en en en en en en en en en en is is is is is is en en is is is is is hbs_lat is wa is en is is ceb en is is is es is en en en en en cs en is is is is is en en is is ceb en is is es en en en en en en en en en en en en en en en en is is en gl is en is is en is en fi en en en kn en en en en en en zh en en it en en en fa en fa en en en en en en en en it en en en ja br es nl fr fr en it nl it fr it en en is en is en cs es is en en en en en en en en en en en ceb is is ilo is is is is is is hbs_lat is is is is is is en is is is is en is
Time to go to bed
Your Startup VS Facebook
We propose a distance converter .
Veldu einingu af ráðstöfun Kilometre - kmMetre - mDecimetre - dmCentimetre - cmMillimetre - mmMicrometre - µmNanometre - nmAngstrom - AMile US - miMile imp - miYard US - ydyard imp - ydfoot US - ftfoot imp - ftInch - inParsec - pcAnnee lumiere - AlUnite astronomique - AEMinute lumiere - MnlSeconde lumiere - SlMile Nautique - n.mi
The meter is the basic unit of length in the International System (SI). It is defined since 1983 as the distance light travels in vacuum in 1/299792458 second.
before 1791 : the lengths were measured in reference to humans (the thumb, foot, fathom) as every human being is different, it often took as reference the King, was a strong symbol of monarchy.
1668 : the meter is equal to 38 inches of Prussia (John Wilkins)
1675 : the meter is equal to the length of a pendulum that swings with a half-period of one second
1791 : Academy of Sciences defines meter meridian which was based on the circumference of the earth, and worth 1 /20 000 000 a meridian.
1799 : Creating a yardstick platinum from the meter M and became the reference.
1889 : the International Bureau of Weights and Measures redefined the meter as the distance between two points on a bar of an alloy of platinum and iridium. This bar is always kept at the Pavillon de Breteuil in Sèvres (like the mass, the calculation of the second or UTC)
1960 : The 11th General Conference on Weights and Measures (CGPM) redefined the meter as 1 650 763.73 wavelengths of orange radiation emitted by the isotope 86 of krypton4.
1983 : Following the discovery of relativity, the speed of light is fixed at 299,792,458 m /s and the meter is redefined as the distance light travels in a vacuum in 1 /299792458 second. This is the most accurate definition for the second unit is the International System (SI) measured with the lowest uncertainty.
▼ Quick access and links © breytir.kingconv.com 2011.▼
viðskipti Cape Verde Escudo
viðskipti CFA franki - BEAC
tími í: Paris ( France )
tími í: New York ( United States )
tími í: Washington ( United States )
tími í: Moscow ( Russia )
tími í: London ( United Kingdom (Great Britain and Northern Ireland) )
tími í: St Barthelemy ( France )
tími í: Los Angeles ( United States )
tími í: Tahiti ( French Polynesia )
tími í: Sydney ( Australia )
tími í: San Francisco ( United States )