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Introductory Physics Homework Help
Calculating Ambulance Frequency Change: -113 Hz
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[QUOTE="Any Help, post: 5646084, member: 605286"] [h2]Homework Statement [/h2] : [SIZE=4]An ambulance has a siren of frequency 880 Hz. You are sitting at a stop light as the ambulance passes you, traveling at a constant 22 m/s. If the speed of sound is 343 m/s, what is the change in the frequency that you hear as the ambulance passes you?[/SIZE] [LIST] [*] A -53 Hz [*][ATTACH=full]203191[/ATTACH] B -60 Hz [*] C -56 Hz [*][ATTACH=full]203192[/ATTACH] D -113 Hz [*] E -116 Hz [/LIST] the correct Answer is D : -113 Hz [h2]Homework Equations[/h2] [ATTACH=full]203193[/ATTACH] WHERE FL and vL are the frequency and velocity of sound heard by the personL fs and vs are the frequency and velocity of sound emmited by the source[h2]The Attempt at a Solution[/h2] using the equation we get FL=880x(343+0)/(343-22) therefore FL=940.3Hz the difference is FL-Fs=940.3-880=60.311Hz but its not correct. the correct answer is -113Hz why? [/QUOTE]
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Calculating Ambulance Frequency Change: -113 Hz
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