An oil of relative density 0.92 and dynamic viscosity 0.9 poise flows though a 10 cm diameter pipe 30 m long. Determine the largest flow that can be passed through this pipe while maintain ing laminar...

An oil of relative density 0.92 and dynamic viscosity 0.9 poise flows though a 10 cm diameter pipe 30 m long. Determine the largest flow that can be passed through this pipe while maintain ing laminar regime. What is the head loss between the two ends of the pipe under this flow?