Dolphins use sonar echo to detect small objects more than 200.0 m from them. If sound travels through the water at 1470 m/s, how long will it be between the time the dolphin makes a sound and hears its echo if the object is 200.0 m away?

Dolphins use sonar echo to detect small objects more than 200.0 m from them. If sound travels through the water at 1470 m/s, how long will it be between the time the dolphin makes a sound and hears its echo if the object is 200.0 m away?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter13: Mechanical Waves

Section: Chapter Questions

Problem 27P

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Concept explainers

Shock Waves

Shock waves are common in continuum mechanics, and their dominance is attributable to the fact that they are stronger (or even less) compressible. Substantial perturbations propagated as sudden dynamic changes of a compressible medium supersonically. Shock waves are all around us in our daily lives. Lightning, earthquakes, volcanic eruptions, and meteorite impact all produce them in nature. Even the earth, which is protected by its magnetic field, generates a shock wave as in solar wind that travels around 20 Earth radiuses. These shock waves might be either constant, linked to the body, or unsteady, i.e., moving around with time. All of the shocks mentioned above can be damaging, so precautions must be taken to reduce their impact.

Question

Dolphins use sonar echo to detect small
objects more than 200.0 m from them. If
sound travels through the water at 1470 m/s,
how long will it be between the time the
dolphin makes a sound and hears its echo if
the object is 200.0 m away?

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