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Bacteria move back and forth by using their flagella

College Physics | 1st Edition | ISBN: 9781938168000 | Authors: Paul Peter Urone, Roger Hinrichs ISBN: 9781938168000 42

Solution for problem 3CQ Chapter 2

College Physics | 1st Edition

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College Physics | 1st Edition | ISBN: 9781938168000 | Authors: Paul Peter Urone, Roger Hinrichs

College Physics | 1st Edition

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Problem 3CQ

 Problem 3CQ

Bacteria move back and forth by using their flagella (structures that look like little tails). Speeds of up to 50 μm/s (50×10−6 m/s) have been observed. The total distance traveled by a bacterium is large for its size, while its displacement is small. Why is this?

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Solution 3CQ

Bacteria move back and forth by using their flagella (structures that look like little tails) and speeds of up to 50 μm/s (50×) have been observed. The total distance traveled by a bacterium is large for its size, while its displacement is small.

By the virtue of motion, the bacterium would have travelled a large distance with the speed of about . However, the displacement depends on the initial and final position of the bacterium. Since the motion of bacteria is back and forth, the difference between the initial and final positions would be small, and hence the displacement will also be small.

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Chapter 2, Problem 3CQ is Solved
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Textbook: College Physics
Edition: 1
Author: Paul Peter Urone, Roger Hinrichs
ISBN: 9781938168000

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Bacteria move back and forth by using their flagella