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  2. Decimal degrees - Wikipedia

    en.wikipedia.org/wiki/Decimal_degrees

    Decimal degrees (DD) is a notation for expressing latitude and longitude geographic coordinates as decimal fractions of a degree.DD are used in many geographic information systems (GIS), web mapping applications such as OpenStreetMap, and GPS devices.

  3. Peak ground acceleration - Wikipedia

    en.wikipedia.org/wiki/Peak_ground_acceleration

    Peak ground acceleration (PGA) is equal to the maximum ground acceleration that occurred during earthquake shaking at a location. PGA is equal to the amplitude of the largest absolute acceleration recorded on an accelerogram at a site during a particular earthquake. [1]

  4. Porosity - Wikipedia

    en.wikipedia.org/wiki/Porosity

    Aggregation involves particulate adhesion and higher resistance to compaction. Typical bulk density of sandy soil is between 1.5 and 1.7 g/cm 3. This calculates to a porosity between 0.43 and 0.36. Typical bulk density of clay soil is between 1.1 and 1.3 g/cm 3. This calculates to a porosity between 0.58 and 0.51.

  5. Surface tension - Wikipedia

    en.wikipedia.org/wiki/Surface_tension

    h is the depth of the puddle in centimeters or meters. γ is the surface tension of the liquid in dynes per centimeter or newtons per meter. g is the acceleration due to gravity and is equal to 980 cm/s 2 or 9.8 m/s 2; ρ is the density of the liquid in grams per cubic centimeter or kilograms per cubic meter

  6. Colt M1861 Navy - Wikipedia

    en.wikipedia.org/wiki/Colt_M1861_Navy

    The Colt Model 1861 Navy cap & ball.36-caliber revolver was a six-shot, single-action percussion weapon produced by Colt's Manufacturing Company from 1861 until 1873. It incorporated the "creeping" or ratchet loading lever and round barrel of the .44-caliber Army Model of 1860 but had a barrel one half inch shorter, at 7.5 inches.

  7. 36 (number) - Wikipedia

    en.wikipedia.org/wiki/36_(number)

    The number of domino tilings of a 4×4 checkerboard is 36. [10] Since it is possible to find sequences of 36 consecutive integers such that each inner member shares a factor with either the first or the last member, 36 is an ErdÅ‘s–Woods number. [11] The sum of the integers from 1 to 36 is 666 (see number of the beast). 36 is also a ...

  8. Power-to-weight ratio - Wikipedia

    en.wikipedia.org/wiki/Power-to-weight_ratio

    Power-to-weight ratio (PWR, also called specific power, or power-to-mass ratio) is a calculation commonly applied to engines and mobile power sources to enable the comparison of one unit or design to another.

  9. Clothing insulation - Wikipedia

    en.wikipedia.org/wiki/Clothing_insulation

    Clothing insulation is the thermal insulation provided by clothing. [1] [2]Even if the main role of clothing is to protect from the cold, protective clothing also exists to protect from heat, such as for metallurgical workers or firemen.