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  2. Naismith's rule - Wikipedia

    en.wikipedia.org/wiki/Naismith's_rule

    So, for example, if a route is 20 kilometres (12 mi) with 1600 metres of climb (as is the case on leg 1 of the Bob Graham Round, Keswick to Threlkeld), the equivalent flat distance of this route is 20+(1.6×8)=32.8 kilometres (20.4 mi). Assuming an individual can maintain a speed on the flat of 5 km/h, the route will take 6 hours and 34 minutes.

  3. Knot (unit) - Wikipedia

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

    The length of the internationally agreed nautical mile is 1 852 m. The US adopted the international definition in 1954, having previously used the US nautical mile ( 1 853 .248 m ). [ 6 ] The UK adopted the international nautical mile definition in 1970, having previously used the UK Admiralty nautical mile ( 6 080 ft or 1 853 .184 m ).

  4. Speed of sound - Wikipedia

    en.wikipedia.org/wiki/Speed_of_sound

    The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elastic medium. More simply, the speed of sound is how fast vibrations travel. At 20 °C (68 °F), the speed of sound in air is about 343 m/s (1,125 ft/s; 1,235 km/h; 767 mph; 667 kn), or 1 km in 2.91 s or one mile in 4.69 s.

  5. 5K challenge: How to walk or run 3 miles in just 6 weeks - AOL

    www.aol.com/november-5k-walking-challenge-walk...

    Week 6: 1-mile speed, 1-mile walk, 1.2-mile speed. ... Week 6: 1-mile jog, 1-mile run, ½-mile jog, .07-mile run. How to measure your distance. If you have a smart watch that you use to track ...

  6. Nautical mile - Wikipedia

    en.wikipedia.org/wiki/Nautical_mile

    A nautical mile is a unit of length used in air, marine, and space navigation, and for the definition of territorial waters. [2] [3] [4] Historically, it was defined as the meridian arc length corresponding to one minute (⁠ 1 / 60 ⁠ of a degree) of latitude at the equator, so that Earth's polar circumference is very near to 21,600 nautical miles (that is 60 minutes × 360 degrees).

  7. Orders of magnitude (speed) - Wikipedia

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

    The top speed of a sloth. 10 −1: 0.2778: 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 ...

  8. Peter Riegel - Wikipedia

    en.wikipedia.org/wiki/Peter_Riegel

    D 1 is the distance over which the initial time is achieved. D 2 is the distance for which the time is to be predicted. Riegel expanded on his thesis in a 1981 article for American Scientist , stating that the formula t=ax b concerns activities in the "endurance range", namely lasting between 3.5 and 230 minutes.

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!