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  2. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    The picometre (SI symbol: pm) is a unit of length in the metric system equal to 1012 metres (⁠ 1 / 1 000 000 000 000 ⁠ m = 0. 000 000 000 001 m). To help compare different orders of magnitude this section lists lengths between 1012 and 10 −11 m (1 pm and 10 pm). 1 pm – distance between atomic nuclei in a white dwarf [citation ...

  3. Pipe (fluid conveyance) - Wikipedia

    en.wikipedia.org/wiki/Pipe_(fluid_conveyance)

    The history of copper pipe is similar. In the 1930s, the pipe was designated by its internal diameter and a 1 ⁄ 16-inch (1.6 mm) wall thickness. Consequently, a 1-inch (25 mm) copper pipe had a 1 + 1 ⁄ 8-inch (28.58 mm) outside diameter. The outside diameter was the important dimension for mating with fittings.

  4. Imperial units - Wikipedia

    en.wikipedia.org/wiki/Imperial_units

    The former Weights and Measures office in Seven Sisters, London (590 Seven Sisters Road). The imperial system of units, imperial system or imperial units (also known as British Imperial [1] or Exchequer Standards of 1826) is the system of units first defined in the British Weights and Measures Act 1824 and continued to be developed through a series of Weights and Measures Acts and amendments.

  5. LME Copper - Wikipedia

    en.wikipedia.org/wiki/LME_Copper

    LME Copper is a group of spot, forward, and futures contracts, trading on the London Metal Exchange ... 2020-08-10, 2020-08-11, and 2020-08-12 are available for ...

  6. Duodecimal - Wikipedia

    en.wikipedia.org/wiki/Duodecimal

    The duodecimal system, also known as base twelve or dozenal, is a positional numeral system using twelve as its base.In duodecimal, the number twelve is denoted "10", meaning 1 twelve and 0 units; in the decimal system, this number is instead written as "12" meaning 1 ten and 2 units, and the string "10" means ten.

  7. Cathode-ray tube - Wikipedia

    en.wikipedia.org/wiki/Cathode-ray_tube

    The amount of x-rays emitted by a CRT can also lowered by reducing the brightness of the image. [136] [137] [138] [102] Leaded glass is used because it is inexpensive, [139] while also shielding heavily against x-rays, although some funnels may also contain barium.

  8. Pressure vessel - Wikipedia

    en.wikipedia.org/wiki/Pressure_vessel

    The ASME definition of a pressure vessel is a container designed to hold gases or liquids at a pressure substantially different from the ambient pressure. [2]The Australian and New Zealand standard "AS/NZS 1200:2000 Pressure equipment" defines a pressure vessel as a vessel subject to internal or external pressure, including connected components and accessories up to the connection to external ...

  9. 12 - Wikipedia

    en.wikipedia.org/wiki/12

    Twelve or 12 may refer to: 12 (number) December, the twelfth and final month of the year; Dozen, a group of twelve. Years. 12 BC; AD 12; 1912; 2012; Film.