Length units. Travel Tips

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Length units. Travel Tips

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Consider some units of length.

Meter (French metre, from Greek metron - measure) is the basic SI unit of length.

A measure of length that reproduces the unit of length - a meter.

Initially (France, 1791) the meter was defined as 1 10-7 parts of the earth's meridian.

Until 1960, the international prototype of the meter was a bar made of Pt-Ir alloy with strokes applied on one of its planes (stored at the International Bureau of Weights and Measures in Sevres near Paris).

From 1960 to 1983, the meter was defined as the length equal to 1650763,73 of the wavelength in the radiation vacuum corresponding to the transition between the levels 2p10 and 5d5 of the 86Kr atom.

According to the definition adopted by the 17th General Conference on Weights and Measures (1983), the Meter is the length of the path traveled by light in a vacuum in 1/299792458 of a second.

Mile (English mile), a unit of length that is widespread in national non-metric systems of units and is now used mainly in maritime affairs. A nautical mile is equal to the length of one minute of an average degree of latitude, a chir is 1852,2 m (10 cable lengths). 1M (nautical) = 1.852 km, in the UK 1M (sea) = 1.853 km, 1M, land (statutory) = 1.609 km (also used in the USA), Geographic mile is equal to 4 minutes of latitude or 7412,6 m, old Russian mile 1M = 7.468 km., in Romania 7,85 km, postal in Poland 8,35 km and 7,59 km in the Czech Republic.

Roman mile. The soldiers of Ancient Rome, walking along the roads of the empire, measured the distance with double steps. The word "mile" itself comes from the Latin mille passus (a thousand steps), which was a measure of distance in Rome. The original Roman mile was 1475 m - this is the distance the legions covered on average after a thousand double steps, the length of which was about one and a half meters. This is somewhat less than the double step of today's adult man.

Metric

1 meter (m) = 100 centimeters (cm)

1 kilometer (km) = 1000 m

1 km - 0,621 statute miles = 0,540 nautical miles

English

1 foot = 12 in.

1 yard = 3 feet = 36 inches

1 land mile = 1760 yards = 5280 feet

1 land mile = 1,609 km = 0,869 nautical mile

sea

1 fathom (fathom) = 6 feet

1 cables = 608 feet

1 NAVAL MILE = 10 CABLE = 6080 feet

1 nautical mile = 1,151 land mile = 1,852 km

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