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  2. Tape measure - Wikipedia

    en.wikipedia.org/wiki/Tape_measure

    Tape measures are often designed for specific uses or trades. Tapes may have different scales, be made of different materials, and be of different lengths depending on the intended use. Tape measures used in tailoring are called "sewing tape". Originally made from flexible cloth or plastic, fiberglass is now the preferred material due to its ...

  3. List of measuring instruments - Wikipedia

    en.wikipedia.org/wiki/List_of_measuring_instruments

    A measuring instrument for lengths: a typical tape measure with both metric and imperial units and two US pennies for comparison A measuring instrument is a device to measure a physical quantity . In the physical sciences , quality assurance , and engineering , measurement is the activity of obtaining and comparing physical quantities of real ...

  4. Compact Cassette tape types and formulations - Wikipedia

    en.wikipedia.org/wiki/Compact_Cassette_tape...

    Remanence of audio tapes, referred to quarter-inch tape width, varies from around 1100 G for basic ferric tapes to 3500 G for Type IV tapes; [5] advertised remanence of the 1986 JVC Type IV cassette reached 4800 G. [6] Coercivity is a measure of the external magnetic flux required to magnetize the tape, and an indicator of the necessary bias level.

  5. Metric system - Wikipedia

    en.wikipedia.org/wiki/Metric_system

    The system's characteristics are that density is expressed in g/cm 3, force expressed in dynes and mechanical energy in ergs. Thermal energy was defined in calories , one calorie being the energy required to raise the temperature of one gram of water from 15.5 °C to 16.5 °C.

  6. Chemistry of pressure-sensitive adhesives - Wikipedia

    en.wikipedia.org/wiki/Chemistry_of_pressure...

    The pressure applied to the tape allows the tape to have better contact with the surface and allows the physical forces between the two to build up. Usually, increased application pressure increases the bond of the adhesive to the substrate. PSA tape laboratory testing is often conducted with a 2 kg roller to increase test uniformity. [13]

  7. Quantities, Units and Symbols in Physical Chemistry

    en.wikipedia.org/wiki/Quantities,_Units_and...

    Quantities, Units and Symbols in Physical Chemistry, also known as the Green Book, is a compilation of terms and symbols widely used in the field of physical chemistry. It also includes a table of physical constants , tables listing the properties of elementary particles , chemical elements , and nuclides , and information about conversion ...

  8. Fractal - Wikipedia

    en.wikipedia.org/wiki/Fractal

    Definition and characteristics [ edit ] One often cited description that Mandelbrot published to describe geometric fractals is "a rough or fragmented geometric shape that can be split into parts, each of which is (at least approximately) a reduced-size copy of the whole"; [ 1 ] this is generally helpful but limited.

  9. Erlenmeyer flask - Wikipedia

    en.wikipedia.org/wiki/Erlenmeyer_flask

    Method of swirling an Erlenmeyer flask during titration. The slanted sides and narrow neck of this flask allow the contents of the flask to be mixed by swirling, without risk of spillage, making them suitable for titrations by placing it under the buret and adding solvent and the indicator in the Erlenmeyer flask. [7]