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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).

  3. Template:Convert - Wikipedia

    en.wikipedia.org/wiki/Template:Convert

    Converts measurements to other units. Template parameters [Edit template data] This template prefers inline formatting of parameters. Parameter Description Type Status Value 1 The value to convert. Number required From unit 2 The unit for the provided value. Suggested values km2 m2 cm2 mm2 ha sqmi acre sqyd sqft sqin km m cm mm mi yd ft in kg g mg lb oz m/s km/h mph K C F m3 cm3 mm3 L mL cuft ...

  4. Foot (unit) - Wikipedia

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

    The Greek foot (πούς, pous) had a length of ⁠ 1 / 600 ⁠ of a stadion, [12] one stadion being about 181.2 m (594 ft); [13] therefore a foot was, at the time, about 302 mm (11.9 in). Its exact size varied from city to city and could range between 270 mm (10.6 in) and 350 mm (13.8 in), but lengths used for temple construction appear to ...

  5. List of semiconductor scale examples - Wikipedia

    en.wikipedia.org/wiki/List_of_semiconductor...

    Mohamed M. Atalla, Dawon Kahng: Bell Telephone Laboratories [2] [3] NMOS: 10,000 nm: 100 nm: PMOS Mohamed M. Atalla, Dawon Kahng: Bell Telephone Laboratories [4] NMOS May 1965: 8,000 nm 150 nm: NMOS Chih-Tang Sah, Otto Leistiko, A.S. Grove Fairchild Semiconductor [5] 5,000 nm: 170 nm: PMOS December 1972: 1,000 nm? PMOS Robert H. Dennard, Fritz ...

  6. Thousandth of an inch - Wikipedia

    en.wikipedia.org/wiki/Thousandth_of_an_inch

    In areas of machining where the thou is used, 0.0001 inches (2.54 micrometres) is often treated as a basic unit and can be referred to as "one tenth", meaning "one tenth of a thou" or "one ten thousandth". [8] Other common terms used in machining with Imperial units involve adding tenths together to achieve a specific tolerance or measurement.

  7. Far infrared - Wikipedia

    en.wikipedia.org/wiki/Far_infrared

    It encompasses radiation with wavelengths ranging from 15 μm (micrometers) to 1 mm, which corresponds to a frequency range of approximately 20 THz to 300 GHz. This places far infrared radiation within the CIE IR-B and IR-C bands. [1] The longer wavelengths of the FIR spectrum overlap with a range known as terahertz radiation. [2]

  8. Surface roughness - Wikipedia

    en.wikipedia.org/wiki/Surface_roughness

    The standard is based on the ″M″ (mean line) system. There are many different roughness parameters in use, but R a {\displaystyle Ra} is by far the most common, though this is often for historical reasons and not for particular merit, as the early roughness meters could only measure R a {\displaystyle Ra} .

  9. Minute and second of arc - Wikipedia

    en.wikipedia.org/wiki/Minute_and_second_of_arc

    The physical group size equivalent to m minutes of arc can be calculated as follows: group size = tan(⁠ m / 60 ⁠) × distance. In the example previously given, for 1 minute of arc, and substituting 3,600 inches for 100 yards, 3,600 tan(⁠ 1 / 60 ⁠) ≈ 1.047 inches. In metric units 1 MOA at 100 metres ≈ 2.908 centimetres.