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  2. Human height - Wikipedia

    en.wikipedia.org/wiki/Human_height

    The worst decline was in urban areas that in 1847, the urban height penalty was 2.5 cm (1.0 in). Urban mortality was also much higher than in rural regions. In 1829, the average urban and rural Dutchman was 164 cm (5 ft 5 in). By 1856, the average rural Dutchman was 162 cm (5 ft 4 in) and urban Dutchman was 158 cm (5 ft 2 in). [74]

  3. List of conversion factors - Wikipedia

    en.wikipedia.org/wiki/List_of_conversion_factors

    Sv. ≡ 1 J/kg [44] = 1 Sv = 1 J/kg = 1 m 2 ⋅s 2. Although the definitions for sievert (Sv) and gray (Gy) would seem to indicate that they measure the same quantities, this is not the case. The effect of receiving a certain dose of radiation (given as Gy) is variable and depends on many factors, thus a new unit was needed to denote the ...

  4. Foot (unit) - Wikipedia

    en.wikipedia.org/wiki/Foot_(unit)

    0.3048 m. 30.48 cm. 304.8 mm. The foot (standard symbol: ft) [1][2] is a unit of length in the British imperial and United States customary systems of measurement. The prime symbol, ′, is commonly used to represent the foot. [3] In both customary and imperial units, one foot comprises 12 inches, and one yard comprises three feet.

  5. Conversion of units - Wikipedia

    en.wikipedia.org/wiki/Conversion_of_units

    Conversion of units is the conversion of the unit of measurement in which a quantity is expressed, typically through a multiplicative conversion factor that changes the unit without changing the quantity. This is also often loosely taken to include replacement of a quantity with a corresponding quantity that describes the same physical property ...

  6. Basal area - Wikipedia

    en.wikipedia.org/wiki/Basal_area

    Basal area is the cross-sectional area of trees at breast height (1.3m or 4.5 ft above ground). It is a common way to describe stand density. In forest management, basal area usually refers to merchantable timber and is given on a per hectare or per acre basis. If one cut down all the merchantable trees on an acre at 4.5 feet (1.4 m) off the ...

  7. Help:Convert units - Wikipedia

    en.wikipedia.org/wiki/Help:Convert_units

    An input unit can be converted to any number of output units—the outputs are specified as a "combination" by separating unit codes with a space (" ") or a plus (" + "). Using a space as a separator does not work if any of the unit codes contains a space. For example, each of the following converts 1.2 km 2 to acres, square yards, and hectares.

  8. Standard gravity - Wikipedia

    en.wikipedia.org/wiki/Standard_gravity

    Standard gravity. The standard acceleration of gravity or standard acceleration of free fall, often called simply standard gravity and denoted by ɡ0 or ɡn, is the nominal gravitational acceleration of an object in a vacuum near the surface of the Earth. It is a constant defined by standard as 9.806 65 m/s 2 (about 32.174 05 ft/s 2).

  9. Help:Convert - Wikipedia

    en.wikipedia.org/wiki/Help:Convert

    H:CON. Template { {convert}} is used to convert a value from one unit of measurement to another. This page provides an overview of the options available when using the template. See the documentation at Template:Convert for further details. Help:Convert units • Simplified list of some commonly used units.