Question

A moving source emits a sound of frequency 600.0-Hz. A stationary listener detects a frequency of 640.0-Hz. The ambient temperature is 33.0°C. Determine

a) the speed of sound at the ambient temperature of 33.0°C.

b) the speed of the moving source for the given source and detected frequencies.

Answer #1

b.

The frequency of a sound source is shifted to higher magnitude
when
1.the sound source is moving in a circular path around the
listener.
2.the sound source is stationary and the listener is moving away
from it.
3.the sound source is moving toward a stationary listener.
4.the sound source is moving away from a stationary listener

stationary police car emits a sound of frequency 1200 Hz that
bounces off of a car on the highway and returns with a frequency of
1280 Hz . The police car is right next to the highway, so the
moving car is traveling directly toward or away from it.
Part A: How fast was the moving car going?
Part B: Was the moving car moving towards or away from the
police car?
Part C: What frequency would the police car...

Why is there a Doppler effect when the source of sound is
stationary and the listener is in motion? In which direction should
the listener move to hear a higher frequency? a lower
frequency?

(1) Suppose an oncoming ambulance moving at 115 km/h emits a
steady 810-Hz sound from its siren.
Part (a) What frequency, in Hz, is received by
a person watching the oncoming ambulance? The speed of sound on
this day is 345 m/s.
Part (b) What frequency, in Hz, does she
observe after the ambulance has passed?
(2). In this problem take the speed of sound to be 349 m/s.
How fast, in meters per second, does an observer need to...

A rocket is moving with a speed of 200 m/s towards a stationary
target. While moving, it emits a sound of frequency 1000 Hz. Some
of the sound waves reaching the target get reflected back to the
rocket as an echo. Calculate the difference in the frequency (echo)
as detected by the rocket?

A sound source with a frequency of 1800 Hz moves away 24 m / s
from a reflective wall which also moves away from the source at 26
m / s. If the speed of sound is 343 m / s determine the frequency
that detects the source of the reflected wave. (10 points)

A sound wave of frequency f=300Hz produced by a moving source
40m/s is observed by a stationary observer. The speed of sound in
ambient air is 345 m/s.
As the source moves toward the observer, how far does the
source travel between subsequent wave pulses?
What is the apparent wavelength of the sound wave as perceived
by the observer?
What is the frequency of sound perceived by the observer?
Note, when the source is in motion, the speed of the...

The frequency will sound different if we hear a sound source
moving relative to us. This phenomenon is called the Doppler Effect
in Physics. An ambulance sounds a siren at 1515 Hz and passes a
cyclist moving at 2.12 m / s. After the ambulance passed, the
cyclist heard a siren sound at a frequency of 1501 Hz. The speed of
sound in the air is about 343 m / s.
What is the speed (speed) of the ambulance in...

Please show all your work.
A source of sound is located in a room a distance “L” from a
wall. The room temperature is 72°F. AN observer is located between
the source and the wall at 103 cm from the wall. The observer can
hear a loud sound at the 3rd harmonic and the sound
fades at the 4th harmonic.
What is the velocity of sound in the room?
What is the frequency at which the observer can hear the...

The siren on an ambulance is emitting a sound whose frequency is
2550 Hz. The speed of sound is 343 m/s. (a) If the ambulance is
stationary and you (the "observer") are sitting in a parked car,
what are the wavelength and the frequency of the sound you hear?
(b) Suppose that the ambulance is moving toward you at a speed of
26.2 m/s. Determine the wavelength and the frequency of the sound
you hear. (c) If the ambulance is...

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