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Calculate the fraction of reflected ultrasound energy when ultrasound waves cross from soft tissue into fat if the acoustic impedance for soft tissue is 1.60

Calculate the fraction of reflected ultrasound energy when ultrasound waves cross from soft tissue into fat if the acoustic impedance for soft tissue is 1.60 x 106 kg m-2 s -1 and for fat has the value 1.40 x 106 kg m-2 s -1 .

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