Answered: The sound emitted by the speaker in all…

The sound emitted by the speaker in all directions at the rate of 65 W and the boy standing at the distance of 4.5 m away from the speakers. Find the intensity received by the boy?

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter16: Waves

Section: Chapter Questions

Problem 68P: Transverse waves travel through a string where the tension equals 7.00 N with a speed of 20.00 m/s....

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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

The sound emitted by the speaker in all directions at the rate of 65 W and the boy standing
at the distance of 4.5 m away from the speakers. Find the intensity received by the boy?
(a) 0.425 W/m
(b) 1.825 W/m?
(c) 0.26 W/m²
(d) 2.78 W/m?

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