Viscosity: Glycerin, with a viscosity of 1.5 N ? s/m2, is flowing with an average speed of 1.2 m/s through a tube that has a radius of 5.0 mm and is 25 cm long. What is the drop in pressure over the length of this pipe?
A. 140 kPa
B. 46 kPa
C. 72 kPa
D. 76 kPa
E. 130 kPa
Answer: A
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