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  2. Armourstone - Wikipedia

    en.wikipedia.org/wiki/Armourstone

    Armourstone is a generic term for broken stone with stone masses between 100 and 10,000 kilograms (220 and 22,050 lb) (very coarse aggregate) that is suitable for use in hydraulic engineering. Dimensions and characteristics for armourstone are laid down in European Standard EN13383. [ 1 ]

  3. Equations for a falling body - Wikipedia

    en.wikipedia.org/wiki/Equations_for_a_falling_body

    A set of equations describing the trajectories of objects subject to a constant gravitational force under normal Earth-bound conditions. Assuming constant acceleration g due to Earth's gravity, Newton's law of universal gravitation simplifies to F = mg , where F is the force exerted on a mass m by the Earth's gravitational field of strength g .

  4. Izbash formula - Wikipedia

    en.wikipedia.org/wiki/Izbash_formula

    Consider determining the requisite stone size to protect the base of a channel with a depth of 1 m and an average flow rate of 2 m/s. The stone diameter necessary for protection can be estimated by reconfiguring the formula and inserting the relevant data. The Izbash formula necessitates the use of the velocity "near the stone," which is ambiguous.

  5. Hudson's equation - Wikipedia

    en.wikipedia.org/wiki/Hudson's_equation

    Hudson's equation, also known as Hudson formula, is an equation used by coastal engineers to calculate the minimum size of riprap (armourstone) required to provide satisfactory stability characteristics for rubble structures such as breakwaters under attack from storm wave conditions.

  6. Stone (unit) - Wikipedia

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

    The stone or stone weight (abbreviation: st.) [1] is an English and British imperial unit of mass equal to 14 avoirdupois pounds (6.35 kg). [ nb 1 ] The stone continues in customary use in the United Kingdom and Ireland for body weight .

  7. gc (engineering) - Wikipedia

    en.wikipedia.org/wiki/Gc_(engineering)

    In engineering and physics, g c is a unit conversion factor used to convert mass to force or vice versa. [1] It is defined as = In unit systems where force is a derived unit, like in SI units, g c is equal to 1.

  8. Template:Long ton - Wikipedia

    en.wikipedia.org/wiki/Template:Long_ton

    This template is intended to allow entry of imperial weights (Avoirdupois), measured in tons, hundredweights, quarters and/or pounds (ton, cwt, qr and/or lb) and provide a conversion into pounds and into tonnes (metric tons) or kilograms (if the first parameter is blank or zero).

  9. Rankine scale - Wikipedia

    en.wikipedia.org/wiki/Rankine_scale

    Similar to the Kelvin scale, which was first proposed in 1848, [1] zero on the Rankine scale is absolute zero, but a temperature difference of one Rankine degree (°R or °Ra) is defined as equal to one Fahrenheit degree, rather than the Celsius degree used on the Kelvin scale.