Kilometres Per Hour
The kilometre per hour (American English: kilometer per hour) is a unit of speed, expressing the number of kilometres travelled in one hour. The unit symbol is km/h or km·h−1.
Worldwide, the km/h is the most commonly used speed unit on road signs and car speedometers. Along with the kilowatt hour, km/h is the most commonly used metric unit based on the hour, although the "hour", while not an SI unit, is accepted for use with the International System of Units by the International Bureau of Weights and Measures (BIPM).
In Australian and North American slang and military usage, km/h is commonly pronounced, and sometimes even written, as klicks or kays (K's), although these may also be used to refer to kilometres.
Read more about Kilometres Per Hour: History, Notation History, Regulatory Use, Conversions
Famous quotes containing the word hour:
“That hour in the life of a man when first the help of humanity fails him, and he learns that in his obscurity and indigence humanity holds him a dog and no man: that hour is a hard one, but not the hardest. There is still another hour which follows, when he learns that in his infinite comparative minuteness and abjectness, the gods do likewise despise him, and own him not of their clan.”
—Herman Melville (1819–1891)