Question

A sound wave has a measured period of 2.5 ms and distance of 43 cm lying between wave compressions and neighboring rarefactions.

a) Determine the speed of this wave.

b) If this wave passed from air into water, would its wavelength change? If so, how (increase or decrease) and why? If not, why not.

c)An observer measures a 450 Hz frequency for this sound wave. Assuming that the source is at rest, determine the observers speed.

Answer #1

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...

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...

A sound wave caused by a piano has a frequency of 678 Hz, and
the speed in air is 330 m/s.
(a) What is the wavelength of this wave?
(b) At any given point in space, how long does it take for the
air to go from maximally compressed to maximally expanded?
(c) For two points 72.5 cm apart, what is the phase difference
of the wave between these points?

A distance of 5.60 cm is measured between two adjacent nodes of
a standing wave on a 28.0 cm-long string.
HINT
(a)
In which harmonic number n is the string vibrating?
(b)
Find the frequency (in Hz) of this harmonic if the string has a
mass of 1.25 ✕ 10−2 kg and a tension of 885 N.
Hz

1)Calculate the speed of the waves having a
crest-to-crest distance of 150 cm and the time taken to complete
one cycle is 5 ms.
2)Given the following sound wave equation:
s(x,t)= 150 sin(50x - 140t) dB
a) The amplitude of the wave.
b) the wave frequency and the periodic time
c) the wavelength
d) The time taken for the wave to reach the
first crest.

A stone is dropped from the top of a cliff. The splash it makes
when striking the water below is heard 3.2 s later. How high is the
cliff?
2. The pressure variation is a sound wave is given by Δ P =
0.0035 sin (0.38 π x – 1350 π t) Determine a. the wavelength b. the
frequency c. the speed and d. the displacement amplitude of the
wave. Assume the density of the medium to be 2.2 x...

Open the Wave on a String PhET simulation.
Set the following parameters:
Simulation
PAUSED
Damping
None
Tension
High
Rope’s End
No End
Source
Oscillate
Ruler
Enabled
Amplitude
0.5 cm
Set the frequency of oscillation to 1.5 Hz. Run the simulation
by clicking on the Play/Pause button. Measure the wavelength of the
wave, using the ruler and the Play/Pause button.
Repeat step 3 but increase the frequency to 3 Hz. Determine the
wavelength of the wave. Summarize your data in Data...

A guitar string of length 72.8 cm (which might be out of tune)
has been plucked and is producing a note of frequency 334 Hz. (a)
What is the speed of transverse traveling waves on this guitar
string? Give your answer in m/s. HINT: The note you hear is
produced by the vibrational mode of the string which has the
fundamental (lowest possible) frequency. Draw a picture of the
string vibrating in that mode and determine the wavelength of the...

An ultrasound machine in a hospital uses a sound source at
5.10000MHz.
Assuming that the speed of the ultrasound in the body is same
as water (1440 m/s), determine the wavelength in the body.
If blood cells are moving towards the sound source at a speed
of 0.8 m/s, at what frequency do the crests of the sound wave pass
through the blood cell?
What is the frequency of the sound waves reflected back towards
the source by the blood...

An ultrasound machine in a hospital uses a sound source at
19.00000MHz.
[3 marks] Assuming that the speed of the ultrasound in the body
is same as water (1440 m/s), determine the wavelength in the
body.
[6 marks] If blood cells are moving towards the sound source at
a speed of 0.8 m/s, at what frequency do the crests of the sound
wave pass through the blood cell?
[5 marks] What is the frequency of the sound waves reflected
back...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 16 minutes ago

asked 57 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago