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2. A source of sound having a frequency of 300 Hz is moving at 25 m/s. If the speed of sound in air is 340 m/s, what is the.frequency of the sound heard by (a)J someone in front of the moving Source; (b) someone behind the moving source?

2. A source of sound having a frequency of 300 Hz is moving at 25 m/s. If the speed of sound in air is 340 m/s, what is the.frequency of the sound heard by (a)J someone in front of the moving Source; (b) someone behind the moving source?

College Physics
College Physics
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Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
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Please answer #2, thanks!
WAVES; DOPPLER EFFECT 1. A train engineer blows a whirde of 400-Hz frnguency as the train approaches a station. If nbe speed of the train is 25 mis, what will be the frequency of the sound of the whistle heard by an observer in the saion? Assume the speed of sound is 340 m/s. 4. A source of sound and an observer are moving directly toward each other. The source has a frequency of 500 Hz and a speed of 30 m/s. The speed of the oBserver is 20 m/s. If the speed of sound is 330 m/s, what is the frequency of the sound heard by the observer? 2. A source of sound having a frequency of 300 Hz is moving at 25 m/s. If the speed of sound in air iş 340 m/s, what is the.frequency of the sound heard by (a)J someone in front of the moving source; (5) someone behind the moving source? 5. Compare the shift in frequency if a 2000-Hz source is moving toward you at 15 m/s, versus you moving toward it at 15 m/s. Are the two frequencies exactly the same? Are they close? 3. A Sounding body vibrating at 400 Hz is moving away from someone who hears a pitch corre- sponding to 380 Hz. If the speed of sound in air is 330 m/s, what is the speed of the sounding ody? 6. A train moving at 20 m/s sounds a hom of frequency 200 Hz. Assuming that thc speed of sound is 340 'm/s, what is the frequency of the sound beard by (e) a person toward whom thc train is moving, and (6) somcone from whom the train is moving away? Copy text from image
Transcribed Image Text:WAVES; DOPPLER EFFECT 1. A train engineer blows a whirde of 400-Hz frnguency as the train approaches a station. If nbe speed of the train is 25 mis, what will be the frequency of the sound of the whistle heard by an observer in the saion? Assume the speed of sound is 340 m/s. 4. A source of sound and an observer are moving directly toward each other. The source has a frequency of 500 Hz and a speed of 30 m/s. The speed of the oBserver is 20 m/s. If the speed of sound is 330 m/s, what is the frequency of the sound heard by the observer? 2. A source of sound having a frequency of 300 Hz is moving at 25 m/s. If the speed of sound in air iş 340 m/s, what is the.frequency of the sound heard by (a)J someone in front of the moving source; (5) someone behind the moving source? 5. Compare the shift in frequency if a 2000-Hz source is moving toward you at 15 m/s, versus you moving toward it at 15 m/s. Are the two frequencies exactly the same? Are they close? 3. A Sounding body vibrating at 400 Hz is moving away from someone who hears a pitch corre- sponding to 380 Hz. If the speed of sound in air is 330 m/s, what is the speed of the sounding ody? 6. A train moving at 20 m/s sounds a hom of frequency 200 Hz. Assuming that thc speed of sound is 340 'm/s, what is the frequency of the sound beard by (e) a person toward whom thc train is moving, and (6) somcone from whom the train is moving away? Copy text from image
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