An underground pump initially forces water through a
Chapter , Problem 90(choose chapter or problem)
An underground pump initially forces water through a horizontal pipe at a fl ow rate of 740 gallons per minute. After several years of operation, corrosion and mineral deposits have reduced the inner radius of the pipe to 0.19 m from 0.24 m, but the pressure diff erence between the ends of the pipe is the same as it was initially. Find the fi nal fl ow rate in the pipe in gallons per minute. Treat water as a viscous fl uid.
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