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exphaze

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## Homework Statement

If the velocity v of the air in a boundary layer having a dynamic viscosity of

18x10

^{-6}kg/ms is given in terms of the distance y from the surface by v = ay + by

^{2}

where a and b are constants, calculate the surface shear stress if at 1.5 mm from the surface the velocity is 75 m/s, and at 3.0 mm from the surface it is 105 m/s.

## Homework Equations

τ = μ(du/dy)