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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.

  3. List of tallest buildings - Wikipedia

    en.wikipedia.org/wiki/List_of_tallest_buildings

    In contrast, the Chrysler Building employed a very large 38.1 m (125 ft) spire secretly assembled inside the building to claim the title of world's tallest building with a total height of 318.9 m (1,046 ft), although it had a lower top occupied floor and a shorter height when both buildings' spires were excluded.

  4. Orders of magnitude (length) - Wikipedia

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

    1.75 m – (5 feet 8 inches) – height of average U.S. male human as of 2002 (source: U.S. CDC as per female above) 2.4 m – wingspan of a mute swan; 2.5 m – height of a sunflower; 2.7 m – length of a leatherback sea turtle, the largest living turtle; 2.72 m – (8 feet 11 inches) – tallest-known human (Robert Wadlow) [31] 3 m ...

  5. List of tallest buildings and structures - Wikipedia

    en.wikipedia.org/wiki/List_of_tallest_buildings...

    Taipei 101 in Taipei, Taiwan, set records in three of the four skyscraper categories at the time it opened in 2004; at the time the Burj Khalifa opened in 2010 it remained the world's tallest inhabited building 509.2 m (1,671 ft) as measured to its architectural height (spire).

  6. Average human height by country - Wikipedia

    en.wikipedia.org/wiki/Average_human_height_by...

    160.3 cm (5 ft 3 in) 1.04: 20–29 (N= m:139 f:76, SD= m:6.5 cm (2.6 in) f:5.7 cm (2.2 in)) 33.2%: Measured: 2011 [140] Nigeria: 163.8 cm (5 ft 4 + 1 ⁄ 2 in) 157.8 cm (5 ft 2 in) 1.04: 18–74: 98.6%: Measured: 1994–1996 [94] North Macedonia: 179.2 cm (5 ft 10 + 1 ⁄ 2 in) 164.8 cm (5 ft 5 in) 1.09: 18 (N= m:137 f:132) 1.7%: Measured: 2016 ...

  7. SI base unit - Wikipedia

    en.wikipedia.org/wiki/SI_base_unit

    "The metre, symbol m, is the SI unit of length. It is defined by taking the fixed numerical value of the speed of light in vacuum c to be 299 792 458 when expressed in the unit m s −1, where the second is defined in terms of ∆ν Cs." [1] 1 / 10 000 000 of the distance from the Earth's equator to the North Pole measured on the meridian arc ...

  8. List of humorous units of measurement - Wikipedia

    en.wikipedia.org/wiki/List_of_humorous_units_of...

    Volume was measured in ngogn (equal to 1000 cubic potrzebies), mass in blintz (equal to the mass of 1 ngogn of halva, which is "a form of pie [with] a specific gravity of 3.1416 and a specific heat of .31416"), and time in seven named units (decimal powers of the average earth rotation, equal to 1 "clarke").

  9. Unit of length - Wikipedia

    en.wikipedia.org/wiki/Unit_of_length

    The basic unit of length in the imperial and U.S. customary systems is the yard, defined as exactly 0.9144 m by international treaty in 1959. [2] [10] Common imperial units and U.S. customary units of length include: [11] thou or mil (1 ⁄ 1000 of an inch) inch (25.4 mm) foot (12 inches, 0.3048 m) yard (3 feet, 0.9144 m)