When a horizontal laminar flow occurs between two parallel plates of infinite extent 0.3 m apart, the velocity at the midpoint between the plates is 2.7 m/s.
Calculate
(a) the flow rate through a cross section 0.9 m wide,
(b) the velocity gradient at the surface of the plate,
(e) the wall shearing stress if the fluid has viscosity 1.44 Pa.s,
(d) the pressure drop in each 30 m along the flow.