When.com Web Search

Search results

  1. Results From The WOW.Com Content Network
  2. Middle-distance running - Wikipedia

    en.wikipedia.org/wiki/Middle-distance_running

    This length of long middle-distance or short long-distance race was 3,520 yards (3,218.688 m). Historically, the two-mile took the place that the 3000 m and the 3200 m have today. The first man to break the four-minute barrier for both miles was Daniel Komen ( Kenya ) at Hechtel, Belgium on 19 July 1997 in a time of 7:58.61.

  3. Transportation safety in the United States - Wikipedia

    en.wikipedia.org/wiki/Transportation_safety_in...

    The number of deaths per passenger-mile on commercial airlines in the United States between 2000 and 2010 was about 0.2 deaths per 10 billion passenger-miles. [3] [4] For driving, the rate was 150 per 10 billion vehicle-miles: 750 times higher per mile than for flying in a commercial airplane. For a person who drives a million miles in a ...

  4. Railroads and regulators must address the dangers of long ...

    www.aol.com/railroads-regulators-must-address...

    The average length of trains increased by about 25% from 2008 to 2017. ... feet (4,267 meters), or more than 2 1/2 miles (4 kilometers) long. ... should make sure the FRA has the power to address ...

  5. Mile - Wikipedia

    en.wikipedia.org/wiki/Mile

    The mile, sometimes the international mile or statute mile to distinguish it from other miles, is a British imperial unit and United States customary unit of length; both are based on the older English unit of length equal to 5,280 English feet, or 1,760 yards.

  6. Chain (unit) - Wikipedia

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

    The chain (abbreviated ch) is a unit of length equal to 66 feet (22 yards), used in both the US customary and Imperial unit systems. It is subdivided into 100 links. [1] [2] There are 10 chains in a furlong, and 80 chains in one statute mile. [2]

  7. Dead reckoning - Wikipedia

    en.wikipedia.org/wiki/Dead_reckoning

    The basic formula for DR is Distance = Speed x Time. An aircraft flying at 250 knots airspeed for 2 hours has flown 500 nautical miles through the air. The wind triangle is used to calculate the effects of wind on heading and airspeed to obtain a magnetic heading to steer and the speed over the ground (groundspeed).

  8. Milestone - Wikipedia

    en.wikipedia.org/wiki/Milestone

    Though not architecturally very impressive, being milestones, they were an important part of communication and travel in a large empire. [3] Kos is an ancient Indian unit of distance. It can represent either a distance of approximately 1.8 kilometres (1.1 mi) or 3.2 kilometres (2.0 mi). Minar is a Persian word for tower.

  9. Geographical distance - Wikipedia

    en.wikipedia.org/wiki/Geographical_distance

    Geographical distance or geodetic distance is the distance measured along the surface of the Earth, or the shortest arch length. The formulae in this article calculate distances between points which are defined by geographical coordinates in terms of latitude and longitude. This distance is an element in solving the second (inverse) geodetic ...