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  2. Time signature - Wikipedia

    en.wikipedia.org/wiki/Time_signature

    Mathematically the time signatures of, e.g., 3 4 and 3 8 are interchangeable. In a sense all simple triple time signatures, such as 3 8, 3 4, 3 2, etc.—and all compound duple times, such as 6 8, 6 16 and so on, are equivalent. A piece in 3 4 can be easily rewritten in 3 8, simply by halving the length of the notes.

  3. Simpson's rule - Wikipedia

    en.wikipedia.org/wiki/Simpson's_rule

    Namely, composite Simpson's 1/3 rule requires 1.8 times more points to achieve the same accuracy as trapezoidal rule. [8] Composite Simpson's 3/8 rule is even less accurate. Integration by Simpson's 1/3 rule can be represented as a weighted average with 2/3 of the value coming from integration by the trapezoidal rule with step h and 1/3 of the ...

  4. 68–95–99.7 rule - Wikipedia

    en.wikipedia.org/wiki/68–95–99.7_rule

    In statistics, the 68–95–99.7 rule, also known as the empirical rule, and sometimes abbreviated 3sr, is a shorthand used to remember the percentage of values that lie within an interval estimate in a normal distribution: approximately 68%, 95%, and 99.7% of the values lie within one, two, and three standard deviations of the mean, respectively.

  5. Percentage - Wikipedia

    en.wikipedia.org/wiki/Percentage

    Expressed as a percentage, this is a 6% increase. While many percentage values are between 0 and 100, there is no mathematical restriction and percentages may take on other values. [4] For example, it is common to refer to 111% or −35%, especially for percent changes and comparisons.

  6. AN thread - Wikipedia

    en.wikipedia.org/wiki/AN_thread

    For example, AN6 bolt has a 38-24 thread [3] whereas an -6 AN fitting has a 9 ⁄ 16-18 thread. [ 4 ] Originally parts were made compliant to the specification MIL-F-5509, but they are now controlled under SAE AS (Aerospace Standards) specifications AS4841 through AS4843 and AS4875.

  7. List of countries by number of Internet users - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    Below is a sortable list of countries by number of Internet users as of 2024. Internet users are defined as persons who accessed the Internet in the last 12 months from any device, including mobile phones. [ Note 1] Percentage is the percentage of a country's population that are Internet users. Estimates are derived either from household ...

  8. Firing order - Wikipedia

    en.wikipedia.org/wiki/Firing_order

    Straight-five engines typically use a firing order of 1-2-4-5-3, in order to minimise the primary vibration from the rocking couple. Straight-six engines typically use a firing order of 1-5-3-6-2-4, which results in perfect primary and secondary balance. However, a firing order of 1-2-4-6-5-3 is common on medium-speed marine engines.

  9. Micro Four Thirds system - Wikipedia

    en.wikipedia.org/wiki/Micro_Four_Thirds_system

    The Micro Four Thirds system ( MFT or M4/3 or M43) (マイクロフォーサーズシステム, Maikuro Fō Sāzu Shisutemu) is a standard released by Olympus Imaging Corporation and Panasonic in 2008, [ 1 ] for the design and development of mirrorless interchangeable lens digital cameras, camcorders and lenses. [ 2 ] Camera bodies are ...