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  2. Equations for a falling body - Wikipedia

    en.wikipedia.org/wiki/Equations_for_a_falling_body

    The first equation shows that, after one second, an object will have fallen a distance of 1/2 × 9.8 × 1 2 = 4.9 m. After two seconds it will have fallen 1/2 × 9.8 × 2 2 = 19.6 m; and so on. On the other hand, the penultimate equation becomes grossly inaccurate at great distances. If an object fell 10 000 m to Earth, then the results of both ...

  3. Flight level - Wikipedia

    en.wikipedia.org/wiki/Flight_level

    Minimum vertical separation between two flights abiding by the UK Quadrantal Rule is 500 ft (note these are in geopotential foot units). The level to be flown is determined by the magnetic track of the aircraft, as follows: [14] Magnetic track 000 to, and including, 089° – odd thousands of feet (FL070, 090, 110 etc.)

  4. Visual flight rules - Wikipedia

    en.wikipedia.org/wiki/Visual_flight_rules

    This may be significantly higher than 500 feet or 1,000 feet. 500 ft rule An aircraft must maintain an altitude of 500 feet above the surface, except over open water or sparsely populated areas. In those cases, the aircraft may not be operated closer than 500 feet to any person, vessel, vehicle, or structure. 1000 ft rule

  5. Naismith's rule - Wikipedia

    en.wikipedia.org/wiki/Naismith's_rule

    Alternatively, the rule can be used to determine the equivalent flat distance of a route. This is achieved by recognising that Naismith's rule implies an equivalence between distance and climb in time terms: 3 miles (=15,840 feet) of distance is equivalent in time terms to 2000 feet of climb.

  6. Reduced vertical separation minima - Wikipedia

    en.wikipedia.org/wiki/Reduced_vertical...

    Reduced vertical separation minimum (RVSM) is the reduction, from 2,000 feet to 1,000 feet, of the standard vertical separation required between aircraft flying between flight level 290 (29,000 ft) and flight level 410 (41,000 ft). Expressed in the International System of Units (SI), it is the reduction, from 600 m to 300 m, of required ...

  7. Low Earth orbit - Wikipedia

    en.wikipedia.org/wiki/Low_Earth_orbit

    A low Earth orbit (LEO) is an orbit around Earth with a period of 128 minutes or less (making at least 11.25 orbits per day) and an eccentricity less than 0.25. [1] Most of the artificial objects in outer space are in LEO, peaking in number at an altitude around 800 km (500 mi), [2] while the farthest in LEO, before medium Earth orbit (MEO ...

  8. AOL Mail

    mail.aol.com

    You can find instant answers on our AOL Mail help page. Should you need additional assistance we have experts available around the clock at 800-730-2563.

  9. Speed of light - Wikipedia

    en.wikipedia.org/wiki/Speed_of_Light

    Distance: Time: one foot: 1.0 ns: one metre: ... meaning that it has the same value regardless of the direction in which it is measured. ... 298 000 000 ± 500 000 ...

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