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  2. Kilometres per hour - Wikipedia

    en.wikipedia.org/wiki/Kilometres_per_hour

    The use of SI implicitly required that member states use "km/h" as the shorthand for "kilometres per hour" on official [Note 1] documents. Another EU directive, published in 1975, regulates the layout of speedometers within the European Union, and requires the text "km/h" in all languages, [ 43 ] even where that is not the natural abbreviation ...

  3. Units of measurement in transportation - Wikipedia

    en.wikipedia.org/wiki/Units_of_measurement_in...

    kilometre (km) or kilometer is a metric unit used, outside the US, to measure the length of a journey; the international statute mile (mi) is used in the US; 1 mi = 1.609344 km; nautical mile is rarely used to derive units of transportation quantity.

  4. Knot (unit) - Wikipedia

    en.wikipedia.org/wiki/Knot_(unit)

    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]

  5. Naismith's rule - Wikipedia

    en.wikipedia.org/wiki/Naismith's_rule

    Pace [6] in minutes per kilometre or mile vs. slope angle resulting from Naismith's rule [7] for basal speeds of 5 and 4 km / h. [n 1]The original Naismith's rule from 1892 says that one should allow one hour per three miles on the map and an additional hour per 2000 feet of ascent.

  6. Asteroid impact on moon blasted two grand canyons in 10 minutes

    www.aol.com/news/asteroid-impact-moon-blasted...

    The rubble would have traveled at up to about 2,200 miles (3,600 km) per hour, they found. One of the canyons, called Vallis Planck, measures about 174 miles (280 km) long and 2.2 miles (3.5 km) deep.

  7. Miles per hour - Wikipedia

    en.wikipedia.org/wiki/Miles_per_hour

    km/h 1.609344 ... 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 ...

  8. League (unit) - Wikipedia

    en.wikipedia.org/wiki/League_(unit)

    Although most contemporary accounts used an Arabic mile of 6 444 feet (1,964 metres), which gave a Spanish league of the degree of 25,776 feet (7,857 metres or 4.242 modern nautical miles) others defined an Arabic mile as just 6,000 feet making a Spanish league of the degree 24,000 feet (or 7,315 metres, almost exactly 3.95 modern nautical miles).

  9. Orders of magnitude (speed) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(speed)

    1: 0.6214: 9.2657 × 10 −10: 1 km/h. 0.44704: 1.609344: 1: 1.4912 × 10 −9: 1 mph. 0.5144: 1.852: 1.151: 1.716 × 10 −9: 1 knot (nautical mile per hour) 10 0: 1.2: 4.32: 2.68: 4 × 10 −9: Typical scanning speed of an audio compact disc; the speed of signals (action potentials) traveling along axons in the human cortex. 11.5: 3.6–5. ...