Density (kg/m") Medium speed of Ultrasound (m/s) Air 330 1.3 1000 Water 1500 Blood 1060 1570 925 Fat 1450 Muscle (average) 1075 1590 Bone (varies) 1400-1900 4080 Barium titanate (transducer material) 5600 5500 2. (a) Using the values for density and the speed of ultrasound given in the Table, find that the acoustic impedance of fat tissue Z. (b) Calculate the intensity reflection r coefficient of ultrasound when going from fat to muscle tissue.

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