A3-m-diameter tank is initially filled with water 2 m above the center of a sharp-edged 10-cm-diameter orifice. the tank water surface is open to the atmosphere, and the orifice drains to the atmosphere through a 100-m-long pipe. the friction coefficient of the pipe is taken to be 0.015 and the effect of the kinetic energy correction factor can be neglected. in order to drain the tank faster, a pump is installed near the tank exit. take the loss coefficient as kl = 0.5 for a sharp-edged entrance. the density of water at 30°c is ? = 996 kg/m3. problem 08.079.a pumping power requirement for an average velocity requirement determine how much pump power input is necessary to establish an average water velocity of 6 m/s when the tank is full at z = 2 m. the pump power input necessary to establish an average water velocity of 6 m/s .