Walking between classes, you have probably heard the loud warning sirens that signal approaching storms. These sounds issue from tall poles placed around Clemson University. The sirens produce a sound that has an intensity level of 90 dB at a distance of two meters. If we treat the siren as a point source of sound, what would the intensity level heard by a stationary observer at 20 meters from the siren be? If the frequency of the tone is 2200 Hz, what frequency will an observer driving at 20 m/s towards the pole hear?
Walking between classes, you have probably heard the loud warning sirens that signal approaching storms. These sounds issue from tall poles placed around Clemson University. The sirens produce a sound that has an intensity level of 90 dB at a distance of two meters. If we treat the siren as a point source of sound, what would the intensity level heard by a stationary observer at 20 meters from the siren be? If the frequency of the tone is 2200 Hz, what frequency will an observer driving at 20 m/s towards the pole hear?
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Walking between classes, you have probably heard the loud warning sirens that signal approaching
storms. These sounds issue from tall poles placed around Clemson University. The sirens produce a sound that has an
intensity level of 90 dB at a distance of two meters. If we treat the siren as a point source of sound, what would the
intensity level heard by a stationary observer at 20 meters from the siren be? If the frequency of the tone is 2200 Hz, what
frequency will an observer driving at 20 m/s towards the pole hear?
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