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  2. Tesla (unit) - Wikipedia

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

    One tesla is equal to one weber per square metre. The unit was announced during the General Conference on Weights and Measures in 1960 and is named [ 1 ] in honour of Serbian-American electrical and mechanical engineer Nikola Tesla , upon the proposal of the Slovenian electrical engineer France Avčin .

  3. Electron mass - Wikipedia

    en.wikipedia.org/wiki/Electron_mass

    relative atomic mass of the X Z+ ion 1.007 276 466 77 (10) 15.990 528 174 45 (18) relative atomic mass of the Z electrons 0.000 548 579 909 43 (23) 0.004 388 639 2754 (18) correction for the binding energy −0.000 000 014 5985: −0.000 002 194 1559: relative atomic mass of the neutral atom 1.007 825 032 07 (10) 15.994 914 619 57 (18)

  4. Vertical Offshore Reference Frames - Wikipedia

    en.wikipedia.org/wiki/Vertical_Offshore...

    The grid resolution is 0.008° over the majority of the VORF area, which corresponds to boxes of approximately 900 x 500 metres. There is higher resolution (typically 0.002° to 0.0005°) around rivers and estuaries, and around Portland Bill. Where a file contains higher-resolution data, the high-resolution values are at the end of the file.

  5. Specific modulus - Wikipedia

    en.wikipedia.org/wiki/Specific_modulus

    Consider a beam whose cross-sectional area increases in two dimensions, e.g. a solid round beam or a solid square beam. By combining the area and density formulas, we can see that the radius of this beam will vary with approximately the inverse of the square of the density for a given mass.

  6. Thousandth of an inch - Wikipedia

    en.wikipedia.org/wiki/Thousandth_of_an_inch

    A thousandth of an inch is a derived unit of length in a system of units using inches.Equal to 1 ⁄ 1000 of an inch, a thousandth is commonly called a thou / ˈ θ aʊ / (used for both singular and plural) or, particularly in North America, a mil (plural mils).

  7. Solar constant - Wikipedia

    en.wikipedia.org/wiki/Solar_constant

    A 1903 Langley bolograph with an erroneous solar constant of 2.54 calories/minute/square centimeter. Between 1902 and 1957, measurements by Charles Greeley Abbot and others at various high-altitude sites found values between 1.322 and 1.465 kW/m 2. Abbot showed that one of Langley's corrections was erroneously applied.

  8. Bull's eye level - Wikipedia

    en.wikipedia.org/wiki/Bull's_eye_level

    The device was unique in that it could be placed on a machine bed and show tilt on x and y axes simultaneously; eliminating the need to rotate the level 90 degrees. The device set a new standard of 0.0005 inches per foot resolution (five ten thousands per foot or five arc seconds tilt). The level's production stopped around 1970.

  9. Photochemical machining - Wikipedia

    en.wikipedia.org/wiki/Photochemical_machining

    In general, steel, copper or aluminium workpieces with a thicknesses up to 0.020 in (0.51 mm), part costs will approximate $0.15–0.20 per square inch. As the geometry of the part becomes more complex, photochemical machining gains greater economic advantage over sequential processes such as CNC punching, laser or water-jet cutting, and ...