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Determining the factors that affect the friction losses in a pipe.

A 12-inch cast iron water pipe that has been in service for 50 years is found to have extensive corrosion inside. Inspection of a section of pipe reveals that the inside diameter is half the original value and the equivalent sand roughness Ks has increased from 0.2 mm to 1 mm. describe how these conditions would affect friction losses in the pipe.

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