Question: Consider fluid flow over a surface with a velocity profile given as u(y) = 100(y + 2y^2 0.5y^3) m/s. The dynamic viscosity for air and

Consider fluid flow over a surface with a velocity profile given as u(y) = 100(y + 2y^2 0.5y^3) m/s. The dynamic viscosity for air and liquid water at 20C are 1.825 105 kg/ms and 1.002 103 kg/ms, respectively. Determine the shear stress at the wall surface, if the fluid is air at 1 atm and at a temperature of 20C.

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