The pitch of a sound at a point depends on
the distance of the point from the source
the frequency of the sound
the amplitude of vibrations of the sound
velocity of sound in the medium
If 15 waves are produced per second, what is the frequency?
20 Hz
30 Hz
15 Hz
1/15 Hz
The example of a stringed instrument is
tabla
flute
mouthorgan
violin
One of the following can hear infrasound. This one is
dog
bat
rhinoceros
humans
Which of the following statement best describes frequency?
the maximum disturbance caused by a wave
the number of complete vibrations per second
the distance between one crest of a wave and the next one
the distance travelled by a wave per second
A bat can hear sound at frequency up to 120 kHz. Determine the wavelength of sound in air at this frequency. Take the speed of sound in air to be 344 m/s.
2.87 mm
2.56 mm
3.58 mm
2.42 mm
A man standing 48 m away from a wall fires a gun. The echo is heard after 0.3 seconds. What is the speed of the sound?
320 m/s
400 m/s
300 m/s
340 m/s
Sound is a form of
force
power
tendency
energy
The speed of a wave in a medium is 760 m/s.If 3600 waves are passing through a point in the medium in 21 min, then their wavelength is
13.8 m
25.3 m
41.5 m
57.2 m
Which kind of sound is produced in an earthquake before the main shock wave begins?
ultrasound
infrasound
audible sound
none of the above
