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  2. Speeds and feeds - Wikipedia

    en.wikipedia.org/wiki/Speeds_and_feeds

    Cutting speed may be defined as the rate at the workpiece surface, irrespective of the machining operation used. A cutting speed for mild steel of 100 ft/min is the same whether it is the speed of the cutter passing over the workpiece, such as in a turning operation, or the speed of the cutter moving past a workpiece, such as in a milling operation.

  3. Cessna Citation Excel - Wikipedia

    en.wikipedia.org/wiki/Cessna_Citation_Excel

    The Cessna Citation Excel is an American midsize business jet in the Cessna Citation family. Announced in October 1994, the Model 560XL first flew on February 29 ...

  4. Solar irradiance - Wikipedia

    en.wikipedia.org/wiki/Solar_irradiance

    Global horizontal irradiance (GHI) is the total irradiance from the Sun on a horizontal surface on Earth. It is the sum of direct irradiance (after accounting for the solar zenith angle of the Sun z ) and diffuse horizontal irradiance: [ 6 ] GHI = DHI + DNI × cos ⁡ ( z ) {\displaystyle {\text{GHI}}={\text{DHI}}+{\text{DNI}}\times \cos(z)}

  5. Volumetric flow rate - Wikipedia

    en.wikipedia.org/wiki/Volumetric_flow_rate

    Volumetric flow rate is defined by the limit [3] = ˙ = =, that is, the flow of volume of fluid V through a surface per unit time t.. Since this is only the time derivative of volume, a scalar quantity, the volumetric flow rate is also a scalar quantity.

  6. Unit of measurement - Wikipedia

    en.wikipedia.org/wiki/Unit_of_measurement

    The former Weights and Measures office in Seven Sisters, London Units of measurement, Palazzo della Ragione, Padua. A unit of measurement, or unit of measure, is a definite magnitude of a quantity, defined and adopted by convention or by law, that is used as a standard for measurement of the same kind of quantity. [1]

  7. Taxicab geometry - Wikipedia

    en.wikipedia.org/wiki/Taxicab_geometry

    The L 1 metric was used in regression analysis, as a measure of goodness of fit, in 1757 by Roger Joseph Boscovich. [2] The interpretation of it as a distance between points in a geometric space dates to the late 19th century and the development of non-Euclidean geometries.

  8. Universal Transverse Mercator coordinate system - Wikipedia

    en.wikipedia.org/wiki/Universal_Transverse...

    The Universal Transverse Mercator (UTM) is a map projection system for assigning coordinates to locations on the surface of the Earth.Like the traditional method of latitude and longitude, it is a horizontal position representation, which means it ignores altitude and treats the earth surface as a perfect ellipsoid.

  9. Tree girth measurement - Wikipedia

    en.wikipedia.org/wiki/Tree_girth_measurement

    An Excel spreadsheet can be used to determine the rate the apparent size of the scale changes with distance, and that value can be used to calculate the diameter of the tree given that the tree is circular in cross section and the distance to the front side of the tree is known. Girth then is calculated by multiplying the diameter by pi.