Physics Waves And Oscillations Level: High School
Speed of Sound
The bulk modulus of gas varies with pressure . In the case of the air , the bulk modulus of air is equal to 1.40 times its pressure . The atmospheric pressure at sea level is 1.01 x 105 N/m2 . The density of air at sea level is 1.20 kg/m3 . For these conditions ,what is the speed of sound as it passes through the air ?a) 1.70 km/hr
b) 5280 ft/s
c) 328 m/s
d) 343 m/s
Physics Waves And Oscillations Level: High School
Simple Harmonic Motion
In the following formula for SHM; x = A sin(omega t+ ø) , the ø , represents :a) Period of the waveform
b) Angular frequency
c)Amplitude of oscillation
d) Phase constant
Physics Waves And Oscillations Level: High School
Standing Waves
A cylindrical tube sustains standing waves at the following frequencies : 600 Hz , 800 Hz , and 1000 Hz . The tube does not sustain standing waves at 500 Hz , at 900 Hz , at any frequencies between 600 and 800 Hz frequencies between 800 and 1000 Hz . Determine the fundamental frequency of the tube and whether the tube is open at both ends or has only one end open .a) 50 Hz , both ends
b) 100 Hz , one end
c) 100 Hz , both ends
d) 200 Hz, both ends
e) 200 Hz, both ends
Physics Waves And Oscillations Level: High School
Standing Waves
A rope of length L is clamped a both ends . Which one of the following is not a possible wavelength for standing waves on this rope ?a) L/2
b) 2L/3
c) L
d) 2L
e) 4L
Physics Waves And Oscillations Level: High School
One string on a guitar is exactly in tune . The guitarist uses this string to produce a tone with a frequency of 196 Hz by pressing down at the proper fret . An adjacent string can also be used to produce this tone without being pressed against a fret . However , this adjacent string is out of tune and produces a tone that sounds lower in frequency than the other tone . When the tones are produced simultaneously , the beat frequency is 5.0 Hz . What frequency does the adjacent string produce ?a) 196 Hz
b) 191 Hz
c) 171 Hz
d) 201 Hz
e) 186 Hz
Physics Waves And Oscillations Level: High School
Beats
A guitar string produces 4 beats/s when sounded with a 250 Hz tuning fork and 9 beats per second when sounded with a 255 Hz tuning fork . What is the vibrational frequency of the string ?a) 240 Hz
b) 346 Hz
c) 254 Hz
d) 259 Hz
e) 263 Hz
Physics Waves And Oscillations Level: High School
Diffraction
For a diffraction horn loudspeaker , the sound emerges through a rectangular opening . The opening of a diffraction horn has a width of 0.15 m . If the speaker emits a continuous tome with a wavelength of 0.11 m , at what angle does the first minimum occur ?a) 47 degree
b) 39 degree
c) 23 degree
d) 12 degree
e) 8.4 degree
Physics Waves And Oscillations Level: High School
Interference
Two loudspeakers are located 3 m apart on the stage of an auditorium . A listener at point P is seated 29.0 m from one speaker and 25.0 from the other . A signal generator drives the speakers in phase with the same amplitude and frequency . The wave amplitude at P due to each speaker alone is A . The frequency is then varied between 20 Hz and 300 Hz . The speed of sound is 343 m/s . At what frequency or frequencies will the listener at P hear a maximum intensity ?a) 170 Hz only
b) 113 Hz and 226 Hz
c) 86 Hz , 170 Hz , 257 Hz
d) 57 Hz, 113 Hz , 170 Hz , 227 Hz , and 284 Hz
e) 43 Hz , 85 Hz, 128 Hz, 170 Hz, 213 Hz , 257 Hz , and 298 Hz
Physics Waves And Oscillations Level: High School
Interference
Sound wave are emitted from two speakers . Which one of the following statements about sound wave interference is false ?a) In a region where both destructive and constructive interference occur , energy is not conserved .
b) Destructive interference occurs when two waves are exactly out of phase when they meet .
c) Interference redistributes the energy carried by the individual waves .
d) Constructive interference occurs when two waves are exactly in the phase when they meet .
e) Sound waves undergo diffraction as they exit each speaker
Physics Waves And Oscillations Level: High School
Super Position of Waves
Two pulses of identical shape travel toward each other in opposite directions on a string , as shown in the figure at “click here” . Which one of the following statements concerning the situation is true ?a) The pulses will reflect from each other
b) The pulses will diffract from each other
c) The pulses will interfere to produce a standing wave
d) The pulses will pass through each other and produce beats
e) As the pulse pass through each other , they will interfere destructively .
Physics Waves And Oscillations Level: High School
Speed of Sound
The car in the figure is moving to the left at 35 m/s . The car’s horn continuously emits a 2.20 x 110^2 Hz sound . The figure at “click here” also shows the first two regions of compression of the emitted sound waves . The speed of sound is 343 m/s . How far does the car move in one period of the sound emitted from the horn ?a) 0.08 m
b) 0.16 m
c) 8 m
d) 16 m
e) 35 m
Physics Waves And Oscillations Level: High School
Doppler Effect
A train moving at a constant speed is passing a stationary observer on a platform . On one of the train cars , a flute player is continually playing the note known as concert A (f = 440 Hz) . After the flute has passed , the observer hears the sound as a G which has a frequency of 392 Hz . What is the speed of the train ? The speed of sound in air is 343 m/s .a) 26 m/s
b) 12 m/s
c) 42 m/s
d) 7.3 m/s
e) 37 m/s
Physics Waves And Oscillations Level: High School
Sound Level Intensity
At a distance of 5.0 from a point sound source , the sound intensity level is 110 dB . At what distance is the intensity level 95 dB ?a) 5.0 m
b) 7.1 m
c) 14 m
d) 28 m
e) 42 m
Physics Waves And Oscillations Level: High School
Intensity of Sound
Two boys are whispering in the library . The radiated sound power from one boy’s mouth is 1.2 x 10^-9 W and it spreads out uniformly in all directions . What is the minimum distance the boys must be away from the librarian so that she will not be able to hear them ? The threshold of hearing for the librarian is 1.00 x 10^-12 W/m^2/a) 100 m
b) 35 m
c) 23 m
d) 16 m
e) 9.8 m
Physics Waves And Oscillations Level: High School
Speed of Sound In Solid
The Young’s modulus of aluminum (density = 2700 kg/m^3) is 6.9 x 10^10 N/m^2 . Determine the speed of sound in an aluminum rod .a) 1.4 x 10^3 m/s
b) 2.5 x 10^3 m/s
c) 5.1 x 10^3 m/s
d) 6.3 x 10^3 m/s
e) 7.0 x 10^3 m/s
