One of the following can hear infrasound. This one is
dog
bat
rhinoceros
humans
The example of a stringed instrument is
tabla
flute
mouthorgan
violin
Audible frequency range is
20 Hz to 2 kHz
20 Hz to 20 kHz
20 Hz to 200 kHz
20 Hz to 200 Hz
In a sonar, ultrasonic waves are sent into the sea water and the reflected waves from a sunken ship are received after 2.0 s. If the velocity of waves in sea water is 1450 m/s, find the depth of the sunken ship.
1250 m
1350 m
1450 m
1500 m
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
The properties of ultrasound that make it useful are :
high power and high speed
high power and good directivity
high frequency and high speed
high frequency and bending around the objects
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
When the same note is played on a sitar and a flute, the sound produced can be distinguished from each other because of the difference in :
pitch, loudness and quality
pitch and loudness
quality only
loudness only
The ultrasound waves can penetrate into matter to a large extent because they have
very high speed
very high frequency
very high wavelength
very high amplitude
Sound is a form of
force
power
tendency
energy
