A7-cm diameter horizontal pipe connected to the side of a tank at 4 m below the water surface in the tank discharges water to the atmosphere. a pump located in the pipe can add head to the flow by the relation, hp (m) = q^2 (q in m^3/s) if the losses in the system amounts to 5 m, determine the outflow velocity of the pipe.

On solidification from a melt, the polymer polyethylene forms a semi-crystalline spherulite structure. (i) sketch an individual spherulite and label the amorphous and crystalline regions. (ii) draw a schematic to show the changes in specific volume with temperature during cooling from the melt, comparing it to the theoretical extremes of fully crystalline and fully amorphous (indicate tm and tg)