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10. A sound is transmitted through air (density 1.20 kg/m2) at a velocity of 345 m/s and then through water (density 1.00 x 10 kg/m2) at a velocity of 1495 m/s. Calculate the acoustic impedance in each medium. What fraction of the sounds intensity will be reflected and transmitted in passing from air to water? What fractions would be reflected and transmitted if the sound traveled from water to air?

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