on stion 3 aterial. e table shows data about the density and the speed of sound for different types of Material Density / kg m-3 Speed of sound / m s-1 Air 1.3 330 Blood 1040 1570 Muscle 1050 1580 Fat 940 1450 Bone 1650 4080 a) Calculate the acoustic impedance of i) Fat ii) Bone Calculate the proportion of the ultrasound that is transmitted when ultrasound is incident on a boundary between fat and bone. c) An ultrasound probe transmits a pulse of ultrasound of frequency, fo = 5.000 MHz The reflected signal is found to have a frequency fr = 5.005 MHz The speed of sound in tissue is 1450 ms-1 and the angle between the probe and the artery is 40. skin surface to Calculate the speed of flow of the blood