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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]
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]
Rack with sample component sizes including an A/V half-rack unit. A rack unit (abbreviated U or RU) is a unit of measure defined as 1 + 3 ⁄ 4 inches (44.45 mm). [1] [2] It is most frequently used as a measurement of the overall height of 19-inch and 23-inch rack frames, as well as the height of equipment that mounts in these frames, whereby the height of the frame or equipment is expressed ...
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.
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 .
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.
The depth of the planetary boundary layer ranges from as little as about 100 metres (330 ft) on clear, calm nights to 3,000 m (9,800 ft) or more during the afternoon in dry regions. The average temperature of the atmosphere at Earth's surface is 14 °C (57 °F; 287 K) [ 30 ] or 15 °C (59 °F; 288 K), [ 31 ] depending on the reference.
International Space Station (ISS) 1 ′ 3″ [15] the ISS has a width of about 108 m Minimum resolvable diameter by the human eye: 1 ′ [16] 0.3 meter at 1 km distance [17] For visibility of objects with smaller apparent sizes see the necessary apparent magnitudes. About 100 km on the surface of the Moon: 1 ′