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  2. Mixing ratio - Wikipedia

    en.wikipedia.org/wiki/Mixing_Ratio

    In atmospheric chemistry, mixing ratio usually refers to the mole ratio r i, which is defined as the amount of a constituent n i divided by the total amount of all other constituents in a mixture: = The mole ratio is also called amount ratio. [2]

  3. Mass fraction (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Mass_fraction_(chemistry)

    The mixing of two pure components can be expressed introducing the (mass) mixing ratio of them =. Then the mass fractions of the components will be Then the mass fractions of the components will be w 1 = 1 1 + r m , w 2 = r m 1 + r m . {\displaystyle {\begin{aligned}w_{1}&={\frac {1}{1+r_{m}}},\\w_{2}&={\frac {r_{m}}{1+r_{m}}}.\end{aligned}}}

  4. Sum of normally distributed random variables - Wikipedia

    en.wikipedia.org/wiki/Sum_of_normally...

    To determine the value (), note that we rotated the plane so that the line x+y = z now runs vertically with x-intercept equal to c. So c is just the distance from the origin to the line x + y = z along the perpendicular bisector, which meets the line at its nearest point to the origin, in this case ( z / 2 , z / 2 ) {\displaystyle (z/2,z/2)\,} .

  5. Viscosity models for mixtures - Wikipedia

    en.wikipedia.org/wiki/Viscosity_models_for_mixtures

    In a fluid mixture like a petroleum gas or oil there are lots of molecule types, and within this mixture there are families of molecule types (i.e. groups of fluid components). The simplest group is the n-alkanes which are long chains of CH 2-elements. The more CH 2-elements, or carbon atoms, the longer molecule. Critical viscosity and critical ...

  6. Burgers vortex - Wikipedia

    en.wikipedia.org/wiki/Burgers_vortex

    In fluid dynamics, the Burgers vortex or Burgers–Rott vortex is an exact solution to the Navier–Stokes equations governing viscous flow, named after Jan Burgers [1] and Nicholas Rott. [2]

  7. Memorials, tributes and donations pour in for New Orleans ...

    www.aol.com/orleans-attack-among-15-dead...

    Among the 14 people killed in the New Orleans attack: a warehouse manager, an account executive, an aspiring nurse and two loving parents.

  8. 'The end of seniority': Younger Democrats are challenging ...

    www.aol.com/end-seniority-younger-democrats...

    Jamie Raskin, D-Md., 61, the Oversight Committee’s top Democrat this Congress, announced he would challenge Rep. Jerry Nadler, D-N.Y., 77, the former chairman and incumbent ranking member of the ...

  9. Vector calculus identities - Wikipedia

    en.wikipedia.org/wiki/Vector_calculus_identities

    In Cartesian coordinates, the divergence of a continuously differentiable vector field = + + is the scalar-valued function: ⁡ = = (, , ) (, , ) = + +.. As the name implies, the divergence is a (local) measure of the degree to which vectors in the field diverge.