A long small-diameter tube is to be used as a viscometer by measuring the flowrate throu...

A long small-diameter tube is to be used as a viscometer by measuring the flowrate through the tube as a function of the pressure drop along the tube. The calibration constant, , is calculated by assuming the flow is laminar. For tubes of diameter 0.5, 1.0, and 2.0 mm, determine the maximum flowrate allowed (in cm3/s) if the fluid is (a) 20 °C water, or (b) standard air.