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Pressure gradients in tubes

Q.

The same kind of fluid flows through three very long identical tubes. Each tube has the same diameter but different flow rates of fluid. A scientist measures the pressure of the fluid near the beginning and near the end of each tube.

Which tube has the greatest flow rate (L/min) of fluid?
a) Tube 1
b) Tube 2
c) Tube 3

Explain why the tube you selected has the greatest flow rate (L/min) of liquid.

PHYTUBES

Audiences:

Undergraduate

Topics:

Bulk Flow,  Flux,  Generic,  Physiology,  Biology

Special Instructions

This question has two parts; a multiple choice selection followed by an open response.

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Background Information

Associated Publications

What a Difference in Pressure Makes! A Framework Describing Undergraduate Students’ Reasoning about Bulk Flow Down Pressure Gradients

Jennifer Doherty, Emily Scott, Jack Cerchiara, Lauren Jescovitch, Jenny McFarland, Kevin Haudek, Mary Wenderoth, 2023

Question Instructions

We recommend that you administer these questions as homework and preface the question with these instructions for students:

"For the following question, please respond to the best of your knowledge and using only the information in the question and what you know. Please do not refer to any outside sources (textbooks, notes, internet, etc.). Any reasonable attempt to answer the question will be awarded full credit."

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