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What is the estimated pressure drop per unit length in order to pump water at a volumetric flow rate of 0.03m3/s at 20C through a commercial steel pipe (=4.6105m)20cm in diameter? (For water at 20C:=999kg/m3;=1001106kg/m.s ) Hint: i) Calculate the Reynolds number (Re) first! Determine whether the flow is turbulent or laminar. ii) Use Reynolds number to determine f! iii) Find pressure drop per unit length! A. 40.0Pa/m B. 43.0Pa/m C. 33.0Pa/m D. 35.0Pa/m E. 45.0Pa/m