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  2. Orders of magnitude (length) - Wikipedia

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

    1.5 cm – length of a very large mosquito; 1.6 cm – length of a Jaragua Sphaero, a very small reptile; 1.7 cm – length of a Thorius arboreus, the smallest salamander [111] 2 cm – approximate width of an adult human finger; 2.54 cm1 inch; 3.08568 cm1 attoparsec; 3.4 cm – length of a quail egg [112]

  3. V-Cube 7 - Wikipedia

    en.wikipedia.org/wiki/V-Cube_7

    The V-Cube 7 is a combination puzzle in the form of a 7×7×7 cube. The first mass-produced 7×7×7 was invented by Panagiotis Verdes and is produced by the Greek company Verdes Innovations SA. Other such puzzles have since been introduced by a number of Chinese companies, [ 1 ] some of which have mechanisms which improve on the original.

  4. Millimetre - Wikipedia

    en.wikipedia.org/wiki/Millimetre

    Different lengths as in respect to the electromagnetic spectrum, measured by the metre and its derived scales.The microwave is between 1 meter to 1 millimeter.. The millimetre (international spelling; SI unit symbol mm) or millimeter (American spelling) is a unit of length in the International System of Units (SI), equal to one thousandth of a metre, which is the SI base unit of length.

  5. Seven-dimensional cross product - Wikipedia

    en.wikipedia.org/wiki/Seven-dimensional_cross...

    For example, the first row of multiplications resulting in e 1 in the above listing is obtained by following the three paths connected to e 1 in the lower Fano diagram: the circular path e 2 × e 4, the diagonal path e 3 × e 7, and the edge path e 6 × e 1 = e 5 rearranged using one of the above identities as:

  6. Division (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Division_(mathematics)

    Division is also not, in general, associative, meaning that when dividing multiple times, the order of division can change the result. [7] For example, (24 / 6) / 2 = 2, but 24 / (6 / 2) = 8 (where the use of parentheses indicates that the operations inside parentheses are performed before the operations outside parentheses).

  7. Seven-dimensional space - Wikipedia

    en.wikipedia.org/wiki/Seven-dimensional_space

    When n = 7, the set of all such locations is called 7-dimensional space. Often such a space is studied as a vector space , without any notion of distance. Seven-dimensional Euclidean space is seven-dimensional space equipped with a Euclidean metric , which is defined by the dot product .

  8. Multiplicative order - Wikipedia

    en.wikipedia.org/wiki/Multiplicative_order

    In number theory, given a positive integer n and an integer a coprime to n, the multiplicative order of a modulo n is the smallest positive integer k such that (). [1]In other words, the multiplicative order of a modulo n is the order of a in the multiplicative group of the units in the ring of the integers modulo n.

  9. Orders of magnitude (mass) - Wikipedia

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

    7.8 × 10 6 kg Virginia-class nuclear submarine (submerged weight) [100] 10 7: 1 × 10 7 kg Annual production of Darjeeling tea [101] 5.2 × 10 7 kg RMS Titanic when fully loaded (52,000 tonnes) [102] 9.97 × 10 7 kg Heaviest train ever: Australia's BHP Iron Ore, 2001 record (99,700 tonnes) [103] 10 8: 6.6 × 10 8 kg