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  2. List of unusual units of measurement - Wikipedia

    en.wikipedia.org/wiki/List_of_unusual_units_of...

    An Olympic-size swimming pool holds over 2 acre-feet of water For larger volumes of liquid, one measure commonly used in the media in many countries is the Olympic-size swimming pool. [47] 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).

  3. Slide rule - Wikipedia

    en.wikipedia.org/wiki/Slide_rule

    The width of the slide rule is quoted in terms of the nominal width of the scales. Scales on the most common "10-inch" models are actually 25 cm, as they were made to metric standards, though some rules offer slightly extended scales to simplify manipulation when a result overflows. Pocket rules are typically 5 inches (12 cm).

  4. Average human height by country - Wikipedia

    en.wikipedia.org/wiki/Average_human_height_by...

    16–60 (N= m:583 f:315, SD= m:6.0 cm (2.4 in) f:9.4 cm (3.7 in)) — Measured: 2000 [120] Maldives: 164.7 cm (5 ft 5 in) 153 cm (5 ft 0 in) 1.08: 15–64 (N= m:661 f:1,103) 94.2%: Measured: 2011 [121] Mali – Southern Mali: 171.3 cm (5 ft 7 + 1 ⁄ 2 in) 160.4 cm (5 ft 3 in) 1.07: Rural adults (N= m:121 f:320, SD= m:6.6 cm (2.6 in) f:5.7 cm ...

  5. Horsepower - Wikipedia

    en.wikipedia.org/wiki/Horsepower

    Nominal horsepower = 7 × area of piston in square inches × equivalent piston speed in feet per minute/33,000. For paddle ships, the Admiralty rule was that the piston speed in feet per minute was taken as 129.7 × (stroke) 1/3.38. [28] [29] For screw steamers, the intended piston speed was used. [29]

  6. Water on Mars - Wikipedia

    en.wikipedia.org/wiki/Water_on_Mars

    The ice is only a few feet deep. The ice was confirmed with the Compact Imaging Spectrometer (CRISM) on board the Mars Reconnaissance Orbiter. [ 386 ] Similar exposures of ice have been detected within the mid-latitude mantle (originally proposed to contain buried dusty snow covered with dust and regolith; [ 271 ] ) that drapes most pole-facing ...