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default conversion combinations SI: metre per second: m/s m/s US spelling: meter per second: 1.0 m/s (3.3 ft/s) m/s ft/s (m/s foot/s) non-SI metric: kilometre per hour: km/h km/h US spelling: kilometer per hour: 1.0 km/h (0.62 mph) km/h mph; Imperial & US customary: mile per hour: mph mph 1.0 mph (1.6 km/h) mph km/h; mile per second: mi/s mi/s ...
Speed limit sign in the Republic of Ireland, using "km/h.". The SI representations, classified as symbols, are "km/h", "km h −1" and "km·h −1".Several other abbreviations of "kilometres per hour" have been used since the term was introduced and many are still in use today; for example, dictionaries list "kph", [3] [4] [5] "kmph" and "km/hr" [6] as English abbreviations.
mph: mph: 0.44704: mile per hour: miles per hour: km/h: Miles per hour: Ns/kg: N-s/kg: 1: N-s/kg: N-s/kg: isp: Specific impulse: si tsfc: g/(kN·s) 1/101972/9.80665: invert: g/(kN·s) g/(kN·s) tsfc: Thrust specific fuel consumption: tsfc: lb/(lbf·h) 1/9.80665/3600: invert: lb/(lbf·h) lb/(lbf·h) si tsfc: Thrust specific fuel consumption: kWh ...
The knot (/ n ɒ t /) is a unit of speed equal to one nautical mile per hour, exactly 1.852 km/h (approximately 1.151 mph or 0.514 m/s). [1] [2] The ISO standard symbol for the knot is kn. [3]
Research in 1998 showed that the reduction of some 30 mph (48 km/h) United Kingdom speed limits to 20 mph (32 km/h) had achieved only a 1 mph (1.6 km/h) drop in speeds and no discernible reduction in accidents; 20 mph (32 km/h) speed limit zones, which use self-enforcing traffic calming, achieved average speed reductions of 10 mph (16 km/h ...
Miles per hour (mph, m.p.h., MPH, or mi/h) is a British imperial and United States customary unit of speed expressing the number of miles travelled in one hour. It is used in the United Kingdom , the United States , and a number of smaller countries, most of which are UK or US territories, or have close historical ties with the UK or US.
mph: 0.44704: mile per hour: miles per hour: km/h: Miles per hour: Ns/kg: N‑s/kg: 1: N‑s/kg: N‑s/kg: isp: Specific impulse: si tsfc: g/(kN⋅s) 1/101972/9.80665: invert: g/(kN⋅s) g/(kN⋅s) tsfc: Thrust specific fuel consumption: tsfc: lb/(lbf⋅h) 1/9.80665/3600: invert: lb/(lbf⋅h) lb/(lbf⋅h) si tsfc: Thrust specific fuel ...
The fastest possible speed at which energy or information can travel, according to special relativity, is the speed of light in vacuum c = 299 792 458 metres per second (approximately 1 079 000 000 km/h or 671 000 000 mph).