You are riding a bicycle at 15.0 m/s toward a woman who is holdinga screaming ba

Question

You are riding a bicycle at 15.0 m/s toward a woman who is holdinga screaming baby. You note that you hear the scream at a perfectmiddle A (440 Hz) Part a) Find the actual frequency of the baby's scream. AssumeVsound=340 m/s
Partb) You sound a tuning fork and hear a beat frequency of 6hertz. What are the possible frequencies of the sound coming fromthe tuning fork?
Part a) Find the actual frequency of the baby's scream. AssumeVsound=340 m/s
Partb) You sound a tuning fork and hear a beat frequency of 6hertz. What are the possible frequencies of the sound coming fromthe tuning fork?

Explanation / Answer

The equation for when a source is stationary and the observeris moving is: f = fo (v+vo)/(v) where fo isthe actual frequency and vo is the speed of the observerand is positive since the observer is moving toward thesource. fo = (v)/(v +vo) * f = 340/(340 + 15) *440Hz = 421.4Hz fbeat = f2-f1 Since the beat freq = 6Hz and I am assuming that you arecomparing the 440Hz, the possible frequencies coming from thetuning fork could be 6Hz in either direction: 446Hz or 434Hz Hope that helps

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