Laminar tank draining—M . The tank and pipe shown in Fig. P3.3 are initially filled with a liquid of viscosity μ and density ρ. Assuming laminar flow, taking pipe friction to be the only resistance,...

Laminar tank draining—M . The tank and pipe shown in Fig. P3.3 are initially filled with a liquid of viscosity μ and density ρ. Assuming laminar flow, taking pipe friction to be the only resistance, and ignoring exit kinetic-energy effects, prove that the time taken to drain just the tank is: