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  2. Drill bit sizes - Wikipedia

    en.wikipedia.org/wiki/Drill_bit_sizes

    Below is a chart providing the decimal-fraction equivalents that are most relevant to fractional-inch drill bit sizes (that is, 0 to 1 by 64ths). (Decimal places for .25, .5, and .75 are shown to thousandths [.250, .500, .750], which is how machinists usually think about them ["two-fifty", "five hundred", "seven-fifty"]. Machinists generally ...

  3. Standard wire gauge - Wikipedia

    en.wikipedia.org/wiki/Standard_wire_gauge

    A standard wire gauge. British Standard Wire Gauge (often abbreviated to Standard Wire Gauge or SWG) is a unit for denoting wire size given by BS 3737:1964 (now withdrawn). It is also known as the Imperial Wire Gauge or British Standard Gauge.

  4. Hemocytometer - Wikipedia

    en.wikipedia.org/wiki/Hemocytometer

    The gridded area of the Improved Neubauer ruled hemocytometer consists of nine 1 x 1 mm (1 mm 2) squares.These are subdivided in three directions; 0.25 x 0.25 mm (0.0625 mm 2), 0.25 x 0.20 mm (0.05 mm 2) and 0.20 x 0.20 mm (0.04 mm 2).

  5. Kelvin - Wikipedia

    en.wikipedia.org/wiki/Kelvin

    [39] [40] [41] The 13th CGPM also held in Resolution 4 that "The kelvin, unit of thermodynamic temperature, is equal to the fraction ⁠ 1 / 273.16 ⁠ of the thermodynamic temperature of the triple point of water."

  6. 41xx steel - Wikipedia

    en.wikipedia.org/wiki/41xx_steel

    41xx steel is a family of SAE steel grades, as specified by the Society of Automotive Engineers (SAE). Alloying elements include chromium and molybdenum, and as a result these materials are often informally referred to as chromoly steel (common variant stylings include chrome-moly, cro-moly, CrMo, CRMO, CR-MOLY, and similar).

  7. Thronium family - Wikipedia

    en.wikipedia.org/wiki/Thronium_family

    The family is considered a non-catastrophic asteroid family because 9799 Thronium, its largest member, makes up nearly all of the family's total mass, rather than simply being the largest of a number of fragments each making up a small fraction of the original destroyed asteroid. [4]

  8. HD 219617 - Wikipedia

    en.wikipedia.org/wiki/HD_219617

    The helium fraction of the binary star at present cannot be reliably determined, and appears to be near the primordial helium abundance. [ 10 ] The binary star HD 219617 is part of the hierarchical triple system LDS 6393, together with the red subdwarf VB 12 (LHS 541) of spectral class sdM3 [ 11 ] at a projected separation of 19″ (1,200 AU ...

  9. Technetium-99 - Wikipedia

    en.wikipedia.org/wiki/Technetium-99

    Technetium-99 (99 Tc) is an isotope of technetium which decays with a half-life of 211,000 years to stable ruthenium-99, emitting beta particles, but no gamma rays.It is the most significant long-lived fission product of uranium fission, producing the largest fraction of the total long-lived radiation emissions of nuclear waste.