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  2. Orders of magnitude (length) - Wikipedia

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

    The centimetre (SI symbol: cm) is a unit of length in the metric system equal to 10 −2 metres (⁠ 1 / 100 ⁠ m = 0.01 m). To help compare different orders of magnitude, this section lists lengths between 10 −2 m and 10 −1 m (1 cm and 1 dm). 1 cm – 10 millimeters; 1 cm – 0.39 inches; 1 cm – edge of a square of area 1 cm 2

  3. 160-meter band - Wikipedia

    en.wikipedia.org/wiki/160-meter_band

    160-meter band refers to the band of radio frequencies between 1.8 and 2 MHz, just above the medium wave broadcast band. For many decades the lowest radio frequency band allocated for use by amateur radio , before the adoption, at the beginning of the 21st century in most countries, of the 630- and 2200-meter bands.

  4. Angstrom - Wikipedia

    en.wikipedia.org/wiki/Angstrom

    10 −8 cm Imperial units ... .4696 of the wavelength of that line (in dry air at 15 °C (hydrogen scale) and 760 mmHg under a gravity of 9.8067 m/s 2). ...

  5. Body surface area - Wikipedia

    en.wikipedia.org/wiki/Body_surface_area

    There was an average BSA of 1.73 m 2 for 3,000 cancer patients from 1990 to 1998 in a European Organisation for Research and Treatment of Cancer (EORTC) database. [19] During 2005 there was an average BSA of 1.79 m 2 for 3,613 adult cancer patients in the UK. Among them the average BSA for men was 1.91 m 2 and for women was 1.71 m 2. [20]

  6. Precipitation - Wikipedia

    en.wikipedia.org/wiki/Precipitation

    The standard way of measuring rainfall or snowfall is the standard rain gauge, which can be found in 10 cm (3.9 in) plastic and 20 cm (7.9 in) metal varieties. [83] The inner cylinder is filled by 2.5 cm (0.98 in) of rain, with overflow flowing into the outer cylinder.

  7. FN 5.7×28mm - Wikipedia

    en.wikipedia.org/wiki/FN_5.7×28mm

    Fired from the shorter 12.2 cm (4.8 in) barrel of the Five-seven pistol, the muzzle velocity of SS195LF is roughly 90 m/s (300 ft/s) slower, and the muzzle velocity of SS197SR is roughly 60 m/s (200 ft/s) slower.

  8. Centimetre or millimetre of water - Wikipedia

    en.wikipedia.org/wiki/Centimetre_or_millimetre...

    A centimetre of water [1] is a unit of pressure. It may be defined as the pressure exerted by a column of water of 1 cm in height at 4 °C (temperature of maximum density) at the standard acceleration of gravity, so that 1 cmH 2 O (4°C) = 999.9720 kg/m 3 × 9.80665 m/s 2 × 1 cm = 98.063754138 Pa ≈ 98.0638 Pa, but conventionally a nominal maximum water density of 1000 kg/m 3 is used, giving ...

  9. ∆ - Wikipedia

    en.wikipedia.org/wiki/%E2%88%86

    ∆ may refer to: . Triangle (∆), one of the basic shapes in geometry. Many different mathematical equations include the use of the triangle.; Delta (letter) (Δ), a Greek letter also used in mathematics and computer science