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(清华大学2006--2007学年春季学期期中考试试题)A viscous liquid of constant density and viscosity falls due to gravity between two parallel plates a distance 2h apart,as in Fig.4-60.0ne plate is moving at speed w0.The flow is fully developed,that is,w=w(x) only.There are no pressure gradients,only gravity Set up and solve the Navier-Stokes equation for the velocity profile w(x).