The viscosity of a fluid is to be measured by a viscometer constructed of two 80-cm-long concentric cylinders. the outer diameter of the inner cylinder is 15 cm, and the gap between the two cylinders is 1 mm. the inner cylinder is rotated at 300 rpm, and the torque is measured to be 0.8 n·m. determine the viscosity of the fluid.

Aseries piping system conveys methyl alcohol. the system consists of 70 m of 1- nominal pipe follow by 50 m of 2-nominal pipe, both schedule 40 commercial steel. the 1-nominal pipe contains 3 90° elbows (regular) anda fully open gate valve, all threaded. the pressure drop through the system is 150 kpa. determine the volume flow rate through the system that is horizontally laid.