Two Horizontal Pipes Have the Same Diameter, but Pipe B $\frac { \Delta V } { \Delta t }$

question 78

Multiple Choice

Two horizontal pipes have the same diameter, but pipe B is twice as long as pipe A. Water undergoes viscous flow in both pipes, subject to the same pressure difference across the lengths of the pipes. If the flow rate in pipe B is Q = $\frac { \Delta V } { \Delta t }$ what is the flow rate in pipe A?

• A) 2Q
• B) 4Q
• C) 8Q
• D) 16Q
• E) Q \(\sqrt { 2 }\)

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Definitions:

Volcanoes

Openings in the Earth's crust through which molten rock, ash, and gases are ejected.

Plate Tectonics

A scientific theory explaining the movement of the Earth's lithosphere, which is divided into tectonic plates, over the more fluid asthenosphere.

Asthenosphere

The highly viscous, mechanically weak, and ductilely-deforming region of the upper mantle of the Earth, which lies just below the lithosphere.

Plate Boundary

The region where two tectonic plates meet, which can be characterized by seismic activity, mountain building, and volcanic eruptions.