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  2. Academy ratio - Wikipedia

    en.wikipedia.org/wiki/Academy_ratio

    Academy ratio 1.375:1. The Academy ratio of 1.375:1 (abbreviated as 1.37:1) is an aspect ratio of a frame of 35 mm film when used with 4-perf pulldown. [1] [2] It was standardized by the Academy of Motion Picture Arts and Sciences as the standard film aspect ratio in 1932, although similar-sized ratios were used as early as 1928.

  3. Tree girth measurement - Wikipedia

    en.wikipedia.org/wiki/Tree_girth_measurement

    If the tree is leaning, measure the circumference at 4 + 1 ⁄ 2 feet (1.37 m) along the axis of the trunk. The distance should be measured along the side of the trunk from the base point of the center of the tree. The measurement is taken at a right (90 degree) angle to the trunk.

  4. Diameter at breast height - Wikipedia

    en.wikipedia.org/wiki/Diameter_at_breast_height

    A tree caliper. The two most common instruments used to measure DBH are a girthing (or diameter) tape and calipers.. A girthing tape actually measures the girth (circumference) of the tree; the girthing tape is calibrated in divisions of π centimetres (3.14159 cm).

  5. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    30 cm = 3 dm – typical school-use ruler length (= 300 mm) 30.48 cm = 3.048 dm – 1 foot (measure) 60 cm = 6 dm – standard depth (front to back) of a domestic kitchen worktop in Europe (= 600 mm) 90 cm = 9 dm – average length of a rapier, a fencing sword [30] 91.44 cm = 9.144 dm – one yard (measure)

  6. List of built-in iOS apps - Wikipedia

    en.wikipedia.org/wiki/List_of_built-in_iOS_apps

    It is capable of measuring in both metric and imperial units and moving the camera closer to an object will display a ruler view which divides measurements into centimeters or inches, respectively. The app also allows for an iPhone to be used as a level; a feature previously available in the Compass app.

  7. Orders of magnitude (mass) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(mass)

    An overview of ranges of mass. To help compare different orders of magnitude, the following lists describe various mass levels between 10 −67 kg and 10 52 kg. The least massive thing listed here is a graviton, and the most massive thing is the observable universe.

  8. Records of heads of state - Wikipedia

    en.wikipedia.org/wiki/Records_of_heads_of_state

    The oldest ruler, whose date of birth is known, is Giovanni Paolo Lascaris. He was Grand Master of the Order of Saint John until his death at the age of 97 years 47 days. [ 29 ] The oldest ruler at the time of taking office is Prem Tinsulanonda , who became regent of Thailand at 96 years 97 days old and ruled for several months. [ 30 ]

  9. Archimedes - Wikipedia

    en.wikipedia.org/wiki/Archimedes

    Archimedes gives the value of the square root of 3 as lying between ⁠ 265 / 153 ⁠ (approximately 1.7320261) and ⁠ 1351 / 780 ⁠ (approximately 1.7320512) in Measurement of a Circle. The actual value is approximately 1.7320508, making this a very accurate estimate. He introduced this result without offering any explanation of how he had ...