In a horizontal pipeline carrying water (density 1000kgm−3) a device records the stagnation pressure at the centre of the stream and the static pressure at the wall. Both pressures are led to a U-tube manometer containing mercury (density 13600kgm−3). The mercury levels in the two limbs differ by 12cm.
a. (i) Calculate the speed of water in the pipe.
b. (ii) Determine the kinetic head expressed in metres of water column corresponding to this flow speed.