A woman is sitting at a bus stop when an ambulance with a siren wailing at 440 Hz approaches at 29.0 m/s (about 65 mph). Assume the speed of sound to be 343 m/s. (a) What frequency (in Hz) does the woman hear? f₂=456.65 ✓ Hz (b) with what speed v (in m/s) would the ambulance have to travel in order for the woman to hear the siren at an apparent frequency of f₂ = 462 Hz? Vs = 5.29 x If you are using the Doppler Calculator, double-check that you are entering the correct quantities in the correct boxes and have selected the source speed as the variable to be computed. Would the source have to be approaching or receding in order for the woman to hear a higher frequency than the frequency emitted by the source? If you are doing the algebra and arithmetic on your own, be sure you have chosen the correct version of the Doppler formula (is the source approaching the woman or receding?) and solved it correctly for source speed. m/s (c) What frequency (in Hz) would the woman hear if the siren moved away from her with the same speed you found in part (b)? fa-474.36 x
A woman is sitting at a bus stop when an ambulance with a siren wailing at 440 Hz approaches at 29.0 m/s (about 65 mph). Assume the speed of sound to be 343 m/s. (a) What frequency (in Hz) does the woman hear? f₂=456.65 ✓ Hz (b) with what speed v (in m/s) would the ambulance have to travel in order for the woman to hear the siren at an apparent frequency of f₂ = 462 Hz? Vs = 5.29 x If you are using the Doppler Calculator, double-check that you are entering the correct quantities in the correct boxes and have selected the source speed as the variable to be computed. Would the source have to be approaching or receding in order for the woman to hear a higher frequency than the frequency emitted by the source? If you are doing the algebra and arithmetic on your own, be sure you have chosen the correct version of the Doppler formula (is the source approaching the woman or receding?) and solved it correctly for source speed. m/s (c) What frequency (in Hz) would the woman hear if the siren moved away from her with the same speed you found in part (b)? fa-474.36 x
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Transcribed Image Text:A woman is sitting at a bus stop when an ambulance with a siren wailing at 440 Hz approaches at 29.0 m/s (about 65 mph). Assume the speed of sound to be 343 m/s.
(a) What frequency (in Hz) does the woman hear?
fa= = 456.65
Hz
(b) with what speed v (in m/s) would the ambulance have to travel in order for the woman to hear the siren at an apparent frequency of f = 462 Hz?
S
Vs
= 5.29
X
If you are using the Doppler Calculator, double-check that you are entering the correct quantities in the correct boxes and have selected the source speed as the variable to be computed.
Would the source have to be approaching or receding in order for the woman to hear a higher frequency than the frequency emitted by the source?
If you are doing the algebra and arithmetic on your own, be sure you have chosen the correct version of the Doppler formula (is the source approaching the woman or receding?) and solved it correctly for
source speed.
m/s
(c) What frequency (in Hz) would the woman hear if the siren moved away from her with the same speed you found in part (b)?
fa
= 474.36
X
If you are using the Doppler Calculator, double-check that you are entering the correct quantities in the correct boxes and have selected the apparent frequency as the variable to be calculated.
Since the source is receding from the woman, should she be hearing an apparent frequency that is higher or lower than the source frequency?
If you are doing the algebra and arithmetic on your own, be sure you have chosen the correct version of the Doppler formula (is the source approaching the woman or receding?), and double-check your
arithmetic.
Hz
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