A loudspeaker on a pole is radiating 100 W of sound energy in all directions. You are
Question:
A loudspeaker on a pole is radiating 100 W of sound energy in all directions. You are walking directly toward the speaker at 0.80 m/s.
When you are 20 m away, what are
(a) The sound intensity level and
(b) The rate (dB/s) at which the sound intensity level is increasing?
Use the chain rule and the relationship log10x = ln x/ln 10.
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Related Book For 
Physics for Scientists and Engineers A Strategic Approach with Modern Physics
ISBN: 978-0133942651
4th edition
Authors: Randall D. Knight
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