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  2. Abacus - Wikipedia

    en.wikipedia.org/wiki/Abacus

    It is a slab of white marble 149 cm (59 in) in length, 75 cm (30 in) wide, and 4.5 cm (2 in) thick, on which are 5 groups of markings. In the tablet's center is a set of 5 parallel lines equally divided by a vertical line, capped with a semicircle at the intersection of the bottom-most horizontal line and the single vertical line.

  3. Santiago de los Caballeros - Wikipedia

    en.wikipedia.org/wiki/Santiago_de_los_Caballeros

    And by 2009, an urban area of approximately 90 km² (55% of the municipality), extending its north-south axis approximately 10 kilometers and its east-west axis 11 kilometers. From 1960 to 2009, Santiago has multiplied its urban population by eight and has expanded its urbanized territory 30 times, leaving only 72 km² available for expansion ...

  4. Manhattan - Wikipedia

    en.wikipedia.org/wiki/Manhattan

    Manhattan Island is divided into three informally bounded components, each cutting across the borough's long axis: Lower ... 78.20%: 31,475 5.92% 1988: 115,927 22.89% ...

  5. Kropyvnytskyi - Wikipedia

    en.wikipedia.org/wiki/Kropyvnytskyi

    The street served as the main axis of the entire composition. It divided the suburb into two equal parts and the direction of its route almost coincided with the center of the fortress. Thus, the fortress with the church in it turned into the third main dominant of the street, although it was located outside its boundaries.

  6. Expected value - Wikipedia

    en.wikipedia.org/wiki/Expected_value

    In probability theory, the expected value (also called expectation, expectancy, expectation operator, mathematical expectation, mean, expectation value, or first moment) is a generalization of the weighted average.

  7. Archimedes - Wikipedia

    en.wikipedia.org/wiki/Archimedes

    Measurement of volume by displacement, (a) before and (b) after an object has been submerged; the amount by which the liquid rises in the cylinder (∆V) is equal to the volume of the object. The most widely known anecdote about Archimedes tells of how he invented a method for determining the volume of an object with an irregular shape.

  8. 2012 phenomenon - Wikipedia

    en.wikipedia.org/wiki/2012_phenomenon

    [35] [c] Thus this inscription anticipates the current universe lasting at least 20 21 ×13×360 days, [26] or roughly 2.687×10 28 years; a time span equal to 2 quintillion times the age of the universe as determined by cosmologists. Others have suggested that this date marks creation as having occurred after that time span.

  9. Pluto - Wikipedia

    en.wikipedia.org/wiki/Pluto

    Pluto's rotation period, its day, is equal to 6.387 Earth days. [ 3 ] [ 98 ] Like Uranus and 2 Pallas , Pluto rotates on its "side" in its orbital plane, with an axial tilt of 120°, and so its seasonal variation is extreme; at its solstices , one-fourth of its surface is in continuous daylight, whereas another fourth is in continuous darkness ...