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Get Full Access to College Physics - 1 Edition - Chapter 17 - Problem 82pe
Get Full Access to College Physics - 1 Edition - Chapter 17 - Problem 82pe

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# Unless otherwise indicated, for problems in | Ch 17 - 82PE

ISBN: 9781938168000 42

## Solution for problem 82PE Chapter 17

College Physics | 1st Edition

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Problem 82PE

Problem 82PE

Unless otherwise indicated, for problems in this section, assume that the speed of sound through human tissues is 1540 m/s.

A dolphin is able to tell in the dark that the ultrasound echoes received from two sharks come from two different objects only if the sharks are separated by 3.50 m, one being that much farther away than the other. (a) If the ultrasound has a frequency of 100 kHz, show this ability is not limited by its wavelength. (b) If this ability is due to the dolphin’s ability to detect the arrival times of echoes, what is the minimum time difference the dolphin can perceive?

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Step 1 of 3

Solution 82PE

1. the sound wave is used to locate the position of the object by sharks; the wavelength of the sound wave is 0.01540 m.

Also, the wavelength 0.01540 m is much shorter than the distance between the sharks 3.50 m. Therefore the wavelength is not the limiting factor.

(b) the time difference can be perceived by the dolphins is 4.55 ms.

Step 2 of 3

Step 3 of 3

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