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  2. Tesla (unit) - Wikipedia

    en.wikipedia.org/wiki/Tesla_(unit)

    One tesla is equal to one weber per square metre. The unit was announced during the General Conference on Weights and Measures in 1960 and is named [ 1 ] in honour of Serbian-American electrical and mechanical engineer Nikola Tesla , upon the proposal of the Slovenian electrical engineer France AvĨin .

  3. Metric system - Wikipedia

    en.wikipedia.org/wiki/Metric_system

    Here, the base units are the quad, equal to 10 7 m (approximately a quadrant of the Earth's circumference), the eleventhgram, equal to 10 −11 g, and the second. These were chosen so that the corresponding electrical units of potential difference, current and resistance had a convenient magnitude. [36]: 268 [37]: 17

  4. Cubic metre per second - Wikipedia

    en.wikipedia.org/wiki/Cubic_metre_per_second

    Cubic metre per second or cubic meter per second in American English (symbol m 3 ⋅ s −1 or m 3 /s) is the unit of volumetric flow rate in the International System of Units (SI). It corresponds to the exchange or movement of the volume of a cube with sides of one metre (39.37 in) in length (a cubic meter , originally a stere ) each second .

  5. Mesh (scale) - Wikipedia

    en.wikipedia.org/wiki/Mesh_(scale)

    Mesh is a measurement of particle size often used in determining the particle-size distribution of a granular material.For example, a sample from a truckload of peanuts may be placed atop a mesh with 5 mm openings.

  6. Speed of light - Wikipedia

    en.wikipedia.org/wiki/Speed_of_Light

    It proposed a new, but completely equivalent, wording of the metre's definition: "The metre, symbol m, is the unit of length; its magnitude is set by fixing the numerical value of the speed of light in vacuum to be equal to exactly 299 792 458 when it is expressed in the SI unit m s −1."

  7. Sphere - Wikipedia

    en.wikipedia.org/wiki/Sphere

    The same applies for the radius if it is taken to equal one, as in the case of a unit sphere. Unlike a ball, even a large sphere may be an empty set. For example, in Z n with Euclidean metric, a sphere of radius r is nonempty only if r 2 can be written as sum of n squares of integers.

  8. Foot per second squared - Wikipedia

    en.wikipedia.org/wiki/Foot_per_second_squared

    The foot per second squared (plural feet per second squared) is a unit of acceleration. [1] It expresses change in velocity expressed in units of feet per second (ft/s) divided by time in seconds (s) (or the distance in feet (ft) traveled or displaced, divided by the time in seconds (s) squared).

  9. Tree volume measurement - Wikipedia

    en.wikipedia.org/wiki/Tree_volume_measurement

    The volume of the limbs and branches can be significant. For example, the Middleton Live Oak (Quercus virginiana), height 67.4 feet, dbh 10.44 feet, crown spread 118 feet) was found to have a trunk volume of 970 ft 3 (24.5 m 3) and a branch volume of 3,850 ft 3 (109 m 3) [15] The branch volume was almost