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Abbreviations for "kilometres per hour" did not appear in the English language until the late nineteenth century. The kilometre, a unit of length, first appeared in English in 1810, [9] and the compound unit of speed "kilometers per hour" was in use in the US by 1866. [10] "Kilometres per hour" did not begin to be abbreviated in print until ...
atmosphere-cubic foot per hour: atm cfh [citation needed] ≡ 1 atm × 1 cu ft/h = 0.797 001 247 04 W: atmosphere-cubic foot per minute: atm cfm [citation needed] ≡ 1 atm × 1 cu ft/min = 47.820 074 682 24 W: atmosphere-cubic foot per second: atm cfs [citation needed] ≡ 1 atm × 1 cu ft/s = 2.869 204 480 9344 × 10 3 W: BTU (International ...
The UK national speed limit of 60 miles per hour (97 km/h) for ordinary vehicles applies beyond this sign. In some countries, derestriction signs are used to mark where a speed zone ends. The speed limit beyond the sign is the prevailing limit for the general area; for example, the sign might be used to show the end of an urban area.
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.
For example, 10 miles per hour can be converted to metres per second by using a sequence of conversion factors as shown below: = . Each conversion factor is chosen based on the relationship between one of the original units and one of the desired units (or some intermediary unit), before being rearranged to create a factor that cancels out the ...
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mile per second: miles per second: km/s: Mile: 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 ...
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