1. The problem statement, all variables and given/known data Water is in laminar flow, in a horizontal pipe 2.5 cm in radius. The pressure drop in a 20m section of the pipe is 3000Pa. The viscosity of the water is 1.2 x 10^-3 N *s/m^3. Calculate the velocity of the water along the axis of the pipe. 2. Relevant equations The Bernoulli equation 3. The attempt at a solution I attempted to apply the Bernoulli equation to this problem, but am not sure what to do with the viscosity of water. Every answer I have come up with is not correct. How does the viscosity fit into this problem (if at all).