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The mass of a primordial black hole with an evaporation time equal to the age of the universe [110] 2 × 10 11 kg Amount of water stored in London storage reservoirs (0.2 km 3) [111] 6 × 10 11 kg Total mass of the world's human population [112] 5 × 10 11 kg
For various reasons, individuals are known to attribute significance to dates and numbers. One notable example is the significance given to "the eleventh hour of the eleventh day of the eleventh month," which corresponds to 11:00 a.m. (Paris time) on 11 November 1918. It marks the moment when the armistice ending World War I took effect. [9]
The look-and-say sequence is also popularly known as the Morris Number Sequence, after cryptographer Robert Morris, and the puzzle "What is the next number in the sequence 1, 11, 21, 1211, 111221?" is sometimes referred to as the Cuckoo's Egg , from a description of Morris in Clifford Stoll 's book The Cuckoo's Egg .
M 100 26.99 +1.1 Donald Pellmann United States 12 August 1915 100 20 September 2015 San Diego, United States Senior Olympics [10] Video on YouTube: 26.34 0.0 Lester Wright sr United States 29 April 1922 100 30 April 2022 Philadelphia, United States Penn Relays [11] 23.40 Fauja Singh Great Britain 1 April 1911 100 13 October 2011 Toronto, Canada
Time Notes Athens 1896 Alfréd Hajós 1:22.2 Paris 1900: not held: St. Louis 1904: the race was 100 yards, not 100 meters: London 1908 Charles Daniels 1:05.6 Stockholm 1912 Duke Kahanamoku 1:03.4 Antwerp 1920 Duke Kahanamoku 1:01.4 Paris 1924 Johnny Weissmuller 59.0 Amsterdam 1928 Johnny Weissmuller 58.6
The Avogadro constant, commonly denoted N A [1] or L, [2] is an SI defining constant with an exact value of 6.022 140 76 × 10 23 mol −1 (reciprocal moles). [3] [4] It defines the number of constituent particles in one mole, where the particles in question can be either molecules, atoms, ions, ion pairs, or any other elementary entities.
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The mathematical constant e can be represented in a variety of ways as a real number.Since e is an irrational number (see proof that e is irrational), it cannot be represented as the quotient of two integers, but it can be represented as a continued fraction.