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  2. Perry–Robertson formula - Wikipedia

    en.wikipedia.org/wiki/Perry–Robertson_formula

    The Perry–Robertson formula is a mathematical formula which is able to produce a good approximation of buckling loads in long slender columns or struts, and is the basis for the buckling formulation adopted in EN 1993. The formula in question can be expressed in the following form:

  3. Molecular mass - Wikipedia

    en.wikipedia.org/wiki/Molecular_mass

    The molecular mass (m) is the mass of a given molecule. Units of daltons (Da) are often used. [1] Different molecules of the same compound may have different molecular masses because they contain different isotopes of an element.

  4. Specific strength - Wikipedia

    en.wikipedia.org/wiki/Specific_strength

    The specific strength is a material's (or muscle's) strength (force per unit area at failure) divided by its density.It is also known as the strength-to-weight ratio or strength/weight ratio or strength-to-mass ratio.

  5. Federal Bridge Gross Weight Formula - Wikipedia

    en.wikipedia.org/wiki/Federal_Bridge_Gross...

    The Federal Bridge Gross Weight Formula, also known as Bridge Formula B or the Federal Bridge Formula, is a mathematical formula in use in the United States by truck drivers and Department of Transportation (DOT) officials to determine the appropriate maximum gross weight for a commercial motor vehicle (CMV) based on axle number and spacing ...

  6. Semi-empirical mass formula - Wikipedia

    en.wikipedia.org/wiki/Semi-empirical_mass_formula

    The corresponding mass formula is defined purely in terms of the numbers of protons and neutrons it contains. The original Weizsäcker formula defines five terms: Volume energy, when an assembly of nucleons of the same size is packed together into the smallest volume, each interior nucleon has a certain number of other nucleons in contact with ...

  7. Specific modulus - Wikipedia

    en.wikipedia.org/wiki/Specific_modulus

    By examining the formulas for area moment of inertia, we can see that the stiffness of this beam will vary approximately as the third power of the radius or height. Thus the second moment of area will vary approximately as the inverse of the cube of the density, and performance of the beam will depend on Young's modulus divided by density cubed .

  8. Gravity of Earth - Wikipedia

    en.wikipedia.org/wiki/Gravity_of_Earth

    This formula only works because of the mathematical fact that the gravity of a uniform spherical body, as measured on or above its surface, is the same as if all its mass were concentrated at a point at its centre. This is what allows us to use the Earth's radius for r. The value obtained agrees approximately with the measured value of g.

  9. Peso Pesado 2 - Wikipedia

    en.wikipedia.org/wiki/Peso_Pesado_2

    Peso Pesado 2 is the second season of the SIC entertainment show Peso Pesado (English: Heavy Weight), the Portuguese version of the original American reality television series The Biggest Loser. It premiered on 2 October 2011 and concluded after 13 weeks of emission (72 daily episodes) with the grand finale, on 31 December 2011.