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  2. Cubic metre - Wikipedia

    en.wikipedia.org/wiki/Cubic_metre

    the volume of a cube of side length one decimetre (0.1 m) equal to a litre 1 dm 3 = 0.001 m 3 = 1 L (also known as DCM (=Deci Cubic Meter) in Rubber compound processing) Cubic centimetre [5] the volume of a cube of side length one centimetre (0.01 m) equal to a millilitre 1 cm 3 = 0.000 001 m 3 = 10 −6 m 3 = 1 mL Cubic millimetre

  3. Divisor (algebraic geometry) - Wikipedia

    en.wikipedia.org/wiki/Divisor_(algebraic_geometry)

    Let X be the quadric cone of dimension 2, defined by the equation xy = z 2 in affine 3-space over a field. Then the line D in X defined by x = z = 0 is not principal on X near the origin. Note that D can be defined as a set by one equation on X , namely x = 0; but the function x on X vanishes to order 2 along D , and so we only find that 2 D is ...

  4. Soil mechanics - Wikipedia

    en.wikipedia.org/wiki/Soil_mechanics

    According to the Unified Soil Classification System, a #4 sieve (4 openings per inch) having 4.75 mm opening size separates sand from gravel and a #200 sieve with an 0.075 mm opening separates sand from silt and clay. According to the British standard, 0.063 mm is the boundary between sand and silt, and 2 mm is the boundary between sand and gravel.

  5. Moment of inertia - Wikipedia

    en.wikipedia.org/wiki/Moment_of_inertia

    Here, the function gives the mass density at each point (,,), is a vector perpendicular to the axis of rotation and extending from a point on the rotation axis to a point (,,) in the solid, and the integration is evaluated over the volume of the body . The moment of inertia of a flat surface is similar with the mass density being replaced by ...

  6. Glossary of geography terms (A–M) - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_geography_terms...

    A unit of area traditionally defined as the area of a plot of land one chain (66 feet) by one furlong (660 feet), equivalent to 43,560 square feet (0.001563 sq mi; 4,047 m 2), or about 0.40 hectare. active volcano A volcano that is currently erupting, or one that has erupted within the last 10,000 years (the Holocene) or during recorded history ...

  7. History of mathematics - Wikipedia

    en.wikipedia.org/wiki/History_of_mathematics

    Perhaps relying on similar gear-work and technology found in the Antikythera mechanism, the odometer of Vitruvius featured chariot wheels measuring 4 feet (1.2 m) in diameter turning four-hundred times in one Roman mile (roughly 4590 ft/1400 m).

  8. Dollar coin (United States) - Wikipedia

    en.wikipedia.org/wiki/Dollar_coin_(United_States)

    The gold dollar weighing 1.672 g produced from 1849 to 1889 in 90% gold 10% copper. 1849 to 1853 gold dollar coins were 13 mm across and are called Type I. Type II gold dollars were thinner but larger at 15 mm diameter and were produced from 1854 to 1855. The most common gold dollar is the Type III, struck from 1856 until 1889.

  9. Aviation safety - Wikipedia

    en.wikipedia.org/wiki/Aviation_safety

    An Air Malta crewman performing a pre-flight inspection of an Airbus A320.. Aviation safety is the study and practice of managing risks in aviation.This includes preventing aviation accidents and incidents through research, educating air travel personnel, passengers and the general public, as well as the design of aircraft and aviation infrastructure.