In an experiment, ground water flows through a sediment column (43.5 cm in length and 5 cm in diameter) at a rate of 4.4 ml/min. the porosity (n) of the sediment is 0.4. Calculate the Darcy flux (q). If the hydraulic conductivity (K) is 0.11 cm/s, calculate the hydraulic gradient (dh/dl). What is the flow velocity (v)

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?