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21 meters – height of High Force waterfall in England; 30.5 meters – length of the lion's mane jellyfish, the largest jellyfish in the world; 33 meters – length of a blue whale, [127] the largest animal on earth, living or extinct, in terms of mass; 39 meters – length of a Supersaurus, the longest-known dinosaur and longest vertebrate [128]
A 50 m × 25 m (164 ft × 82 ft) Olympic swimming pool, built to the FR3 minimum depth of 2 metres (6.6 ft) would hold 2,500 m 3 (660,000 US gal). The US National Institute of Standards and Technology (NIST) defines the Olympic swimming pool as 1 million litres, which is the approximate volume of the smaller FR2 pool.
A metric space M is bounded if there is an r such that no pair of points in M is more than distance r apart. [b] The least such r is called the diameter of M. The space M is called precompact or totally bounded if for every r > 0 there is a finite cover of M by open balls of radius r. Every totally bounded space is bounded.
9 ft 8 in (2.95 m) Liverpool and Manchester Railway 1830 at opening day; later widened. 10 ft 8.5 in (3.26 m) United Kingdom (standard gauge plus 6 ft) 11 ft 0 in (3.35 m) New South Wales 1855 old standard (estimated) 12 ft 0 in (3.66 m) New South Wales 1910 new standard for 10 ft 6 in (3.20 m) wide carriages. Rounded in imperial.
For instance the same angle of 0.1 mrad will subtend 10 mm at 100 meters, 20 mm at 200 meters, etc., or similarly 0.39 inches at 100 m, 0.78 inches at 200 m, etc. Subtensions in mrad based optics are particularly useful together with target sizes and shooting distances in metric units .
Calculation of the area of a square whose length and width are 1 metre would be: 1 metre × 1 metre = 1 m 2. and so, a rectangle with different sides (say length of 3 metres and width of 2 metres) would have an area in square units that can be calculated as: 3 metres × 2 metres = 6 m 2. This is equivalent to 6 million square millimetres.
It is also a measure of the space-filling capacity of a pattern and tells how a fractal scales differently, in a fractal (non-integer) dimension. [ 1 ] [ 2 ] [ 3 ] The main idea of "fractured" dimensions has a long history in mathematics, but the term itself was brought to the fore by Benoit Mandelbrot based on his 1967 paper on self-similarity ...
By multiplication, the best IAU 2009 estimate was A = c 0 τ A = 149 597 870 700 ± 3 m, [20] based on a comparison of Jet Propulsion Laboratory and IAA–RAS ephemerides. [21] [22] [23] In 2006, the BIPM reported a value of the astronomical unit as 1.495 978 706 91 (6) × 10 11 m. [8]