what are the two modes of sound transfer through which we can hear the sound
of the approaching train?
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Answer:
ULTRASOUND AND INFRASOUND
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Answer:
It is more convenient to put the ear to the track to hear a train approaching from far away because sound travels faster in solids than in air because the speed of sound is directly proportional to the density of the material medium. In this case, the density of railway track is higher than air. Hence, sound waves travel faster through the railway track.
the two modes are solid and gas,the solid train track and the air
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