Draw a curve showing density or pressure variations with respect to
distance for a disturbance produced by sound. Mark the position of
compression and rarefaction on this curve. Also define wavelengths and
time period using this curve.
Represent graphically by two separate diagrams in each case
(i) Two sound waves having the same amplitude but different frequencies?
(ii) Two sound waves having the same frequency but different amplitudes.
(iii) Two sound waves having different amplitudes and also different
wavelengths.
Why is the ceiling and wall behind the stage of good conference halls or
concert halls made curved?
If any explosion takes place at the bottom of a lake, what type of shock
waves in water will take place?
Why do we hear the sound produced by the humming bees while the sound
of vibrations of pendulum is not heard?
A girl is sitting in the middle of a park of dimension 12 m × 12 m. On the
left side of it there is a building adjoining the park and on right side of the
park, there is a road adjoining the park. A sound is produced on the road
by a cracker. Is it possible for the girl to hear the echo of this sound?
Explain your answer.
Before playing the orchestra in a musical concert, a sitarist tries to adjust
the tension and pluck the string suitably. By doing so, he is adjusting
(a) intensity of sound only
(b) amplitude of sound only
(c) frequency of the sitar string with the frequency of other musical
instruments
(d) loudness of sound
Earthquake produces which kind of sound before the main shock wave begins
(a) ultrasound
(b) infrasound
(c) audible sound
(d) none of the above
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