4. Speed of sound, 343 m s-?, air, liquids. 5. Compression, rarefaction, high pressure.
6. Reflection, rigid surface, porous surface.
7. Speaking tube, reflection, absorption. New Trends in ICSE Physics - 7 choose the odd one out and give reason
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Speed of sound, 343 m s-1, air, liquids. 5. Compression, rarefaction, high pressure. 6. Reflection, rigid surface, porous surface. 7. Speaking
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