(3) Pipe Flow (a) Determine the nature of the distribution of shear stress at a cross section in a horizontal circular pipe under steady flow conditions; What is: (b) the equation for velocity distribution; (c) the shear stress at the walls of a 305 mm diameter pipe when water flowing causes a measured head loss of 15 m in 300 m pipe length; (d) the shear stress 51 mm from the centre line of the pipe; (e) the shear velocity; (f) the average velocity for a friction factor f= 0.050; (g) an equation expressing the ratio of velocity to shear velocity.