A sample of bone has a volume of 2.0 cm3 and a mass of 3.80 g. The speed of ultrasound in this bone sample is 3500 m s-1. What is the acoustic impedance of the bone?
6.65×103 kg m−2 s−16.65 \times 10^3\text{ kg m}^{-2}\text{ s}^{-1}6.65×103 kg m−2 s−1
6.65×104 kg m−2 s−16.65 \times 10^4\text{ kg m}^{-2}\text{ s}^{-1}6.65×104 kg m−2 s−1
6.65×106 kg m−2 s−16.65 \times 10^6\text{ kg m}^{-2}\text{ s}^{-1}6.65×106 kg m−2 s−1
6.65×1012 kg m−2 s−16.65 \times 10^{12}\text{ kg m}^{-2}\text{ s}^{-1}6.65×1012 kg m−2 s−1
