A speaker produces 100 (w) of power. If the speaker projects sound uniformly into the forward hemisphere, what is the intensity at 4m away from the speaker a) 15.92 w/ m? b) 3.98 w/ m? c) 1.77 w/ m? d) 1.00 w/ m2

A speaker produces 100 (w) of power. If the speaker projects sound uniformly into the forward hemisphere, what is the intensity at 4m away from the speaker a) 15.92 w/ m? b) 3.98 w/ m? c) 1.77 w/ m? d) 1.00 w/ m2

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter17: Physics Of Hearing

Section: Chapter Questions

Problem 64PE: (a) What are the loudnesses in phons of sounds having frequencies of 200, 1000, 5000, and 10,000 Hz....

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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

A speaker produces 100 (w) of power. If the speaker projects sound uniformly
into the forward hemisphere, what is the intensity at 4m away from the speaker
a) 15.92 w/ m?
b) 3.98 w/ m?
c) 1.77 w/ m?
d) 1.00 w/ m?
O 1. c
O 2. a
O 3. b
O 4. d

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