Two students are at two ends of a room. One of the students claps softly but the other 1 student is unable to hear the sound. The student takes a long metals rod and asks his friend to put the ear at the other end of the rod. The student taps the end with the same intensity and now the friend at the other end is able to hear the sound. What can be concluded by this observation?
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particles in a solid substance are closer to each other hence it is convenient for sound waves to travel faster and to a longer distance
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