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  2. Foot-lambert - Wikipedia

    en.wikipedia.org/wiki/Foot-lambert

    A foot-lambert or footlambert (fL, sometimes fl or ft-L) is a unit of luminance in United States customary units and some other unit systems. A foot-lambert equals 1/π or 0.3183 candela per square foot , or 3.426 candela per square meter (the corresponding SI unit ).

  3. How to Solve It - Wikipedia

    en.wikipedia.org/wiki/How_to_Solve_It

    How to Solve It (1945) is a small volume by mathematician George Pólya, describing methods of problem solving. [1] This book has remained in print continually since ...

  4. Help:Convert units - Wikipedia

    en.wikipedia.org/wiki/Help:Convert_units

    Metric prefixes; Text Symbol Factor or; yotta Y 10 24: 1 000 000 000 000 000 000 000 000: zetta Z 10 21: 1 000 000 000 000 000 000 000: exa E 10 18: 1 000 000 000 000 000 000: peta P 10 15: 1 000 000 000 000 000: tera T

  5. Orders of magnitude (length) - Wikipedia

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

    An adult human foot is about 28 cm (11 in) long. The decimetre ( SI symbol: dm ) is a unit of length in the metric system equal to 10 −1 metres ( ⁠ 1 / 10 ⁠ m = 0.1 m ). To help compare different orders of magnitude , this section lists lengths between 10 centimeters and 100 centimeters (10 −1 meter and 1 meter).

  6. List of conversion factors - Wikipedia

    en.wikipedia.org/wiki/List_of_conversion_factors

    1 ⁄ 4 long cwt = 2 st = 28 lb av = 12.700 586 36 kg: quarter (informal) ≡ 1 ⁄ 4 short ton = 226.796 185 kg: quarter, long (informal) ≡ 1 ⁄ 4 long ton = 254.011 7272 kg: quintal (metric) q ≡ 100 kg = 100 kg scruple : s ap ≡ 20 gr = 1.295 9782 g: sheet: ≡ 1 ⁄ 700 lb av = 647.9891 mg slug; geepound: slug ≡ g 0 × 1 lb av × ...

  7. Finite element method - Wikipedia

    en.wikipedia.org/wiki/Finite_element_method

    Finite element method (FEM) is a popular method for numerically solving differential equations arising in engineering and mathematical modeling. Typical problem areas of interest include the traditional fields of structural analysis, heat transfer, fluid flow, mass transport, and electromagnetic potential. Computers are usually used to perform ...

  8. Acre-foot - Wikipedia

    en.wikipedia.org/wiki/Acre-foot

    As the name suggests, an acre-foot is defined as the volume of one acre of surface area to a depth of one foot.. Since an acre is defined as a chain by a furlong (i.e. 66 ft × 660 ft or 20.12 m × 201.17 m), an acre-foot is 43,560 cubic feet (1,233.5 m 3).

  9. Sylvester equation - Wikipedia

    en.wikipedia.org/wiki/Sylvester_equation

    Given two square complex matrices A and B, of size n and m, and a matrix C of size n by m, then one can ask when the following two square matrices of size n + m are similar to each other: [] and [].