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  2. Help:Convert units - Wikipedia

    en.wikipedia.org/wiki/Help:Convert_units

    The hands value has at most one digit after the decimal mark, and has an optional fraction. A precision of 2 assumes |frac=2 (round to nearest 1 ⁄ 2 inch). A precision of 3 or more assumes |frac=4 (round to nearest 1 ⁄ 4 inch).

  3. Shoe size - Wikipedia

    en.wikipedia.org/wiki/Shoe_size

    ISO/TS 19407:2023 Footwear - Sizing - Conversion of sizing systems is a technical specification from the International Organization for Standardization. It contains basic description and conversion tables for major shoe sizing systems [ 8 ] including Mondopoint with length steps of 5 mm and 7.5 mm, European Paris point system, and UK 1 ⁄ 3 ...

  4. Iodine-123 - Wikipedia

    en.wikipedia.org/wiki/Iodine-123

    Iodine-123 (123 I) is a radioactive isotope of iodine used in nuclear medicine imaging, including single-photon emission computed tomography (SPECT) or SPECT/CT exams. The isotope's half-life is 13.2232 hours; [1] the decay by electron capture to tellurium-123 emits gamma radiation with a predominant energy of 159 keV (this is the gamma primarily used for imaging).

  5. Approximations of π - Wikipedia

    en.wikipedia.org/wiki/Approximations_of_π

    The latter fraction is the best possible rational approximation of π using fewer than five decimal digits in the numerator and denominator. Zu Chongzhi's results surpass the accuracy reached in Hellenistic mathematics, and would remain without improvement for close to a millennium.

  6. Scientific notation - Wikipedia

    en.wikipedia.org/wiki/Scientific_notation

    Conversion between different scientific notation representations of the same number with different exponential values is achieved by performing opposite operations of multiplication or division by a power of ten on the significand and an subtraction or addition of one on the exponent part.

  7. Pie chart - Wikipedia

    en.wikipedia.org/wiki/Pie_chart

    Pie chart of populations of English native speakers. A pie chart (or a circle chart) is a circular statistical graphic which is divided into slices to illustrate numerical proportion. In a pie chart, the arc length of each slice (and consequently its central angle and area) is proportional to the quantity it represents.

  8. Fibonacci sequence - Wikipedia

    en.wikipedia.org/wiki/Fibonacci_sequence

    The convergents of the continued fraction for φ are ratios of successive Fibonacci numbers: φ n = F n+1 / F n is the n-th convergent, and the (n + 1)-st convergent can be found from the recurrence relation φ n+1 = 1 + 1 / φ n. [31] The matrix formed from successive convergents of any continued fraction has a determinant of +1 or −1.

  9. Renewable energy - Wikipedia

    en.wikipedia.org/wiki/Renewable_energy

    Share of electricity production from renewables, 2023 [207] Deaths caused as a result of fossil fuel use (areas of rectangles in chart) greatly exceed those resulting from production of renewable energy (rectangles barely visible in chart). [208] Policies to support renewable energy have been vital in their expansion.