Oil, with a density of ρ = 900 kg m=3 and a kinematic viscosity of v = 0.1 m^2 s^-1, flows at a volume flow rate of q 0.2 m^3 s^-1 through 500 m of 200 mm diameter pipe which has a roughness of 0.26 mm. the chart for the fanning friction factor is given on p.8. determine: (i) the head loss if the pipe is installed horizontally and (ii) the pressure drop if the pipe slopes down at angle 10° in the flow direction from the horizontally installed position in (i).