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Encyclopedia > Kilometres per hour

Kilometres per hour (American spelling: kilometers per hour) is a unit of both speed (scalar) and velocity (vector). The symbol is km·h−1 or km/h but is often, though incorrectly, abbreviated to kph (see also mph). It is often spoken and sometimes written as klicks or kays in slang usage. English language spread in the United States. ... The definition, agreement and practical use of units of measurement have played a crucial role in human endeavour from early ages up to this day. ... Speed is the rate of motion, or equivalently the rate of change of position, many times expressed as distance d moved per unit of time t. ... In physics, a scalar is a simple physical quantity that does not depend on direction, and therefore does not depend on the choice of a coordinate system. ... The velocity of an object is simply its speed in a particular direction. ... In physics and in vector calculus, a spatial vector is a concept characterized by a magnitude, which is a scalar, and a direction (which can be defined in a 3-dimensional space by the Euler angles). ... Miles per hour is a unit of speed, expressing the number of international miles covered per hour. ... Slang is the use of highly informal words and expressions that are not considered standard in the speakers dialect or language. ...


By definition, an object travelling at a speed of 1 km·h−1 in a straight line for an hour would move 1 kilometre. km redirects here. ...


Although much more common in everyday usage than m/s, it is not an SI unit (because the hour isn't). Cover of brochure The International System of Units. ... The hour (symbol: h) is a unit of time. ...


Conversions

The metre, or meter (US), is a measure of length. ... Look up second in Wiktionary, the free dictionary. ... SI derived units are part of the SI system of measurement units and are derived from the seven SI base units. ... Metre per second (U.S. spelling: meter per second) is an SI derived unit of both speed (scalar) and velocity (vector), defined by distance in metres divided by time in seconds. ... The metre, or meter (US), is a measure of length. ... Look up second in Wiktionary, the free dictionary. ... Miles per hour is a unit of speed, expressing the number of international miles covered per hour. ... Feet per second is a unit of speed; it expressses the number of feet traveled in one second. ... A knot is a unit of speed, abbreviated kt or kn. ...

See also

To help compare different orders of magnitude, the following list describes various speed levels between 1. ...

External links

  • Conversion Calculator for Units of Speed

  Results from FactBites:
 
BoM - WA Tropical Cyclone Season Summary 1995-96 (1556 words)
At peak intensity Jacob was a Category 3 storm with wind gusts near the centre estimated to be 200 kilometres per hour.
The maximum wind gust of 267 kilometres per hour recorded on Varanus Island is the strongest to be recorded at 10 metres above ground level in an Australian cyclone.
A wind gust of 257 kilometres per hour was recorded at Mardie Station, this being the second highest recorded on the Australian mainland, the highest being 259 kilometres per hour also at Mardie, during Trixie in February 1975.
SPEED = MILES OR KILOMETRES PER HOUR CONVERSION TABLES | SPEED OF LIGHT | SPEED OF SOUND | SPEED ACE NELSON KRUSCHANDL. (0 words)
Miles per hour is a unit of speed, expressing the number of international miles covered per hour.
Miles per hour is the unit used for speed limits on roads in the US and Britain.
Kilometre per hour (American spelling: kilometer per hour) is a unit of both speed (scalar) and velocity (vector).
  More results at FactBites »

 
 

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