Converti cubit (uk) a metro

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Viceversa: metro a cubit (uk)

Cubit (UK)

La cubit è one of the oldest noto units di lunghezza, originally based on the distance from the elbow to the tip of the middle finger. La English cubit era standardised at 18 inches (circa 0.4572 metres), though ancient variants ranged from about 44 to 53 centimetres depending on civilisation. The cubit era fundamental to construction e trade in ancient Egypt, Mesopotamia, e across the classical world, e appears throughout historical texts including the Hebrew Bible. 


metro

La metre (Commonwealth spelling e BIPM spelling) o meter (American spelling) (from the French unit mètre, from the Greek noun μετρούν, "measure") è the unità base di lunghezza nel Sistema Internazionale di Unità (SI). The SI unit symbol è m. Il metro è definito as the length of the path travelled by light in a vacuum in 1/299,792,458 of a second.

Il metro era originally definito in 1793 as one ten-millionth of the distance from the equator to the North Pole along a great circle, so the Earth's circumference è circa 40000 km. In 1799, the metre era redefined in terms of a prototype metre bar (the actual bar usato era changed in 1889). In 1960, the metre era redefined in terms of a certain number of wavelengths of a certain emission line of krypton-86. In 1983, the current definition era adopted. 


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