(2) To increase the loudness of the sound by 16 times, by how much should be the amplitude of vibration be changed? (3) Give an example to show that light travels faster than sound. (4) What factors decide the frequency of vibration of a plucked string? (5) If you hear a firecracker 2 seconds after it is fired, how far away from it are you? (Assume the speed of the sound in air is 330 m/s)
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imcrease mobil volume and divide it from 2
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