A Water Pipe Must Deliver at Least 10 Litres Per

question 14

Multiple Choice

A water pipe must deliver at least 10 litres per second to a water tank on a property on the outskirts of a country town. The pipe will have to be 2 km long, and is fed by the town water supply which delivers a pressure difference of 100 000 Pa. What is the minimum radius this pipe needs? The viscosity of water is 0.001 Pa s.

• A) 1.0 cm
• B) 1.6 cm
• C) 3.5 cm
• D) 2.7 cm
• E) 15 cm
• ANS

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