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  2. List of yarns for crochet and knitting - Wikipedia

    en.wikipedia.org/wiki/List_of_yarns_for_crochet...

    Knitting gauge (number of stitches per four inches) [1] Metric knitting needle size [1] US knitting needle size Lace fingering, crochet 10-count thread 33 - 40 sts 1.5 - 2.25 mm B-1 33 - 40 sts 1.5mm - 2.25mm Super fine sock, fingering, baby 21 - 32 sts 2.25 - 3.5 mm B-1 - E-4 27 - 32 sts 2.25mm -3.25mm Fine sport, baby 16 - 20 sts 3.5 - 4.5 mm ...

  3. Four-point flexural test - Wikipedia

    en.wikipedia.org/wiki/Four-point_flexural_test

    Compared to the three-point bending flexural test, there are no shear forces in the four-point bending flexural test in the area between the two loading pins. [1] The four-point bending test is therefore particularly suitable for brittle materials that cannot withstand shear stresses very well.

  4. Yarn weight - Wikipedia

    en.wikipedia.org/wiki/Yarn_weight

    The number of wraps will act as a gauge to assess the thickness of unmarked yarn; for example 12 wraps per inch is 12 WPI, and is used to calculate how much yarn is required for various articles, [3] so that 12 is equivalent to 8 ply (worsted weight, medium weight) yarn.

  5. Shear modulus - Wikipedia

    en.wikipedia.org/wiki/Shear_modulus

    The shear modulus is one of several quantities for measuring the stiffness of materials. All of them arise in the generalized Hooke's law: . Young's modulus E describes the material's strain response to uniaxial stress in the direction of this stress (like pulling on the ends of a wire or putting a weight on top of a column, with the wire getting longer and the column losing height),

  6. Hand knitting - Wikipedia

    en.wikipedia.org/wiki/Hand_knitting

    Knitting is worked in rounds (the equivalent of rows in flat knitting). Originally, circular knitting was done using a set of four or five double-pointed knitting needles. Circular needles were later invented making this type of knitting easier. A circular needle resembles two short knitting needles connected by a cable of varying length ...

  7. Poly(methyl methacrylate) - Wikipedia

    en.wikipedia.org/wiki/Poly(methyl_methacrylate)

    It has a density of 1.17–1.20 g/cm 3, [1] [16] which is approximately half that of glass, which is generally, depending on composition, 2.2–2.53 g/cm 3. [1] It also has good impact strength, higher than both glass and polystyrene, but significantly lower than polycarbonate and some engineered polymers.

  8. Comparative Tracking Index - Wikipedia

    en.wikipedia.org/wiki/Comparative_Tracking_Index

    To measure the tracking, 50 drops of 0.1% ammonium chloride solution are dropped on the material, and the voltage measured for a 3 mm thickness is considered representative of the material performance. Also term PTI (Proof Tracking Index) is used: it means voltage at which during testing on five samples the samples pass the test with no failures.

  9. List of thermal conductivities - Wikipedia

    en.wikipedia.org/wiki/List_of_thermal_conductivities

    Also the copy is blurred up enough to give you the impression that maybe what it really means is 1.36 W −1 cm −1 K −1 and 78.6 Btu hr −1 ft −1 F −1 and a type-head that got overdue for its cleaning since the secretary had a tall heap of papers on her desk and if that is the case then the multilingual expression is perfectly ...

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