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  2. ASTM F568M - Wikipedia

    en.wikipedia.org/wiki/ASTM_F568M

    This standard defines property classes, the metric equivalent of a screw grade, that are almost identical to those defined by ISO 898-1, [2] except for the addition of the 8.8.3 and 10.9.3 classes. These two additional standards are fasteners that have the same mechanical properties as their base property class (i.e. 8.8 and 10.9), but are made ...

  3. Advanced level mathematics - Wikipedia

    en.wikipedia.org/wiki/Advanced_level_mathematics

    Advanced Level (A-Level) Mathematics is a qualification of further education taken in the United Kingdom (and occasionally other countries as well). In the UK, A-Level exams are traditionally taken by 17-18 year-olds after a two-year course at a sixth form or college.

  4. Grading systems by country - Wikipedia

    en.wikipedia.org/wiki/Grading_systems_by_country

    For percentage grades, 0% is awarded for extremely poor performance and 100% is awarded for exceptional work. The grade of 10 is reserved for exceptional achievements. 9 is most commonly used for a United States equivalent of an A. In some cases, the grade can be rounded for example if a student got 67% the grade can sometimes be rounded to a 7.

  5. Washing machine - Wikipedia

    en.wikipedia.org/wiki/Washing_machine

    Despite the high cost of automatic washers, manufacturers had difficulty meeting the demand. Although there were material shortages during the Korean War, by 1953 automatic washing machine sales in the US exceeded those of wringer-type electric machines. In the UK and most of Europe, electric washing machines did not become popular until the 1950s.

  6. Mechanical equivalent of heat - Wikipedia

    en.wikipedia.org/wiki/Mechanical_equivalent_of_heat

    The mechanical equivalent of heat was a concept that had an important part in the development and acceptance of the conservation of energy and the establishment of the science of thermodynamics in the 19th century.

  7. OS X Mountain Lion - Wikipedia

    en.wikipedia.org/wiki/OS_X_Mountain_Lion

    OS X Mountain Lion (version 10.8) is the ninth major release of macOS, Apple Inc.'s desktop and server operating system for Macintosh computers. OS X Mountain Lion was released on July 25, 2012, [3] for purchase and download through the Mac App Store, as part of a switch to releasing OS X versions online and every year, rather than every two years.