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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Definitions:

Brain Size

Brain size refers to the physical dimensions or volume of the brain, which varies significantly among species and can be connected to cognitive abilities and neurological functions in a complex manner.

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Large mammals known for their distinctive long trunks, large ears, and social complexity, found in Africa and Asia and considered to be highly intelligent.

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Aquatic mammals known for their high intelligence, social complexity, and ability to communicate through a variety of sounds.

Nervous Systems

Complex networks of nerves and cells that transmit signals between different parts of the body, coordinating actions and sensory information.