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7. Review: The speed of sound in air is 340 m/s and the speed of sound in water is 1500 m/s. A speaker emits

7. Review: The speed of sound in air is 340 m/s and the speed of sound in water is 1500 m/s. A speaker emits sounds at 20 Hz and 220 Hz separately. What are the wavelengths of these sounds in air and in water? curement

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