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  2. Wilford Gyroplane - Wikipedia

    en.wikipedia.org/wiki/Wilford_Gyroplane

    [1] [2] Its rotor had a diameter of 25 ft (7.6 m), though the broad blades began about 1 ft 3 in (0.38 m) from their common vertical mast. Each blade had an area of about 15 sq ft (1.4 m 2) and an aspect ratio of 8.4. [1] Opposing pairs of blades were rigidly fixed together but free to rotate on their common axis.

  3. Hubble's law - Wikipedia

    en.wikipedia.org/wiki/Hubble's_law

    Simplifying the units of the generalized form reveals that H 0 specifies a frequency (SI unit: s −1), leading the reciprocal of H 0 to be known as the Hubble time (14.4 billion years). The Hubble constant can also be stated as a relative rate of expansion.

  4. Sylhet - Wikipedia

    en.wikipedia.org/wiki/Sylhet

    31.6 (88.9) 32.2 (90.0) 32.5 (90.5) ... Sylhet has a sex ratio of 861 females to 1000 males and a literacy rate of 67.8%. ... signed a Memorandum of Understanding to ...

  5. Pi - Wikipedia

    en.wikipedia.org/wiki/Pi

    The number π (/ p aɪ / ⓘ; spelled out as "pi") is a mathematical constant, approximately equal to 3.14159, that is the ratio of a circle's circumference to its diameter.It appears in many formulae across mathematics and physics, and some of these formulae are commonly used for defining π, to avoid relying on the definition of the length of a curve.

  6. Demographics of Rwanda - Wikipedia

    en.wikipedia.org/wiki/Demographics_of_Rwanda

    21.8 32.3 8.12 141.6 44.43 1957 2 706 000 145 000 57 000 88 000 53.6 21.1 32.5 8.14 138.1 45.16 1958 2 793 000 148 000 57 000 91 000 53.0 20.5 32.6 8.16 134.5 45.86 1959 2 881 000 151 000 57 000 94 000 52.4 19.8 32.6 8.18 131.1 46.62 1960 2 966 000 154 000 57 000 97 000 51.7 19.2 32.5 8.19 128.1

  7. Geography of Singapore - Wikipedia

    en.wikipedia.org/wiki/Geography_of_Singapore

    The highest 24-hour rainfall figures ever recorded in history were 512.4 mm (20.2 in) (2 December 1978) at Paya Lebar, 467 mm (18.4 in) (1969) and 366 mm (14.4 in) (19 December 2006). [ 3 ] The temperature hovers around a diurnal range of a minimum of 25 °C (77.0 °F) and a maximum of 33 °C (91.4 °F).

  8. Pythagoras - Wikipedia

    en.wikipedia.org/wiki/Pythagoras

    [2] [29] [30] [31] According to these biographers, Pythagoras's father was not born on the island, although he got naturalized there, [30] but according to Iamblichus he was a native of the island. [32] He is said to have been a gem-engraver or a wealthy merchant [33] [34] [35] but his ancestry is disputed and unclear.

  9. Mazda Capella - Wikipedia

    en.wikipedia.org/wiki/Mazda_Capella

    The fourth-generation Capella was released in May 1987. [32] It used the updated GD platform and some versions remained in production in Japan until 1996. Engines were new, though they still emphasized torque rather than outright power. Most of the world received 1.6, 1.8, 2.0, and 2.2 (non-turbo) engines.