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  2. List of unusual units of measurement - Wikipedia

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

    Rack units are typically denoted without a space between the number of units and the 'U'. Thus, a 4U server enclosure (case) is seven inches (177.8 mm) high, or more practically, built to occupy a vertical space seven inches high, with sufficient clearance to allow movement of adjacent hardware.

  3. Fraction - Wikipedia

    en.wikipedia.org/wiki/Fraction

    A simple fraction (also known as a common fraction or vulgar fraction) [n 1] is a rational number written as a/b or ⁠ ⁠, where a and b are both integers. [9] As with other fractions, the denominator (b) cannot be zero. Examples include ⁠ 1 / 2 ⁠, − ⁠ 8 / 5 ⁠, ⁠ −8 / 5 ⁠, and ⁠ 8 / −5 ⁠.

  4. Pseudorapidity - Wikipedia

    en.wikipedia.org/wiki/Pseudorapidity

    Note that is the longitudinal momentum component, which is denoted in the text above (is the standard notation at hadron colliders). The equivalent relations to get the full four-momentum (in natural units) using "true" rapidity are:

  5. Baker percentage - Wikipedia

    en.wikipedia.org/wiki/Baker_percentage

    Baker's percentage is a notation method indicating the proportion of an ingredient relative to the flour used in a recipe when making breads, cakes, muffins, and other baked goods.

  6. Dyadic rational - Wikipedia

    en.wikipedia.org/wiki/Dyadic_rational

    As fractions they are generally dyadic, [14] although non-dyadic time signatures have also been used. [15] The numeric value of the signature, interpreted as a fraction, describes the length of a measure as a fraction of a whole note. Its numerator describes the number of beats per measure, and the denominator describes the length of each beat ...

  7. Millimetre - Wikipedia

    en.wikipedia.org/wiki/Millimetre

    Different lengths as in respect to the electromagnetic spectrum, measured by the metre and its derived scales.The microwave is between 1 meter to 1 millimeter.. The millimetre (international spelling; SI unit symbol mm) or millimeter (American spelling) is a unit of length in the International System of Units (SI), equal to one thousandth of a metre, which is the SI base unit of length.

  8. Newton (unit) - Wikipedia

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

    A newton is defined as 1 kg⋅m/s 2 (it is a named derived unit defined in terms of the SI base units). [1]: 137 One newton is, therefore, the force needed to accelerate one kilogram of mass at the rate of one metre per second squared in the direction of the applied force.

  9. Standard deviation - Wikipedia

    en.wikipedia.org/wiki/Standard_deviation

    For example, the average height for adult men in the United States is about 69 inches, [4] with a standard deviation of around 3 inches. This means that most men (about 68%, assuming a normal distribution ) have a height within 3 inches of the mean ( 66–72 inches ) – one standard deviation – and almost all men (about 95%) have a height ...