Consider a laminar flow in the x- direction between two infinite parallel plates. The upper and lower plates are moving in the opposite direction with a velocity of 5cm/s and 2cm/s respectively. The distance between the plates is 8mm and the dynamic viscosity of the fluid is 0.2 poise. If the pressure gradient between the plates is 5 N/m2 per m, the shear stress at the midway of the plates is _____ N/m2
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