A cardiologist uses an ultrasound scanner at the frequency of 3.2 MHz that can detect a Doppler shift as small as 0.1 kHz. Use that the average speed of sound in tissue is 1550 m/s. Spts I. Determine the smallest blood ow velocity that can be detected by this device. Show the physics approach and all steps. |l. How does this velocity compare to the speed of blood in different blood vessels from capillaries to arteries. The speed of blood ranges from 0.5 cm/s to 50 cm/s in capillaries to arteries, respectively? Can this low frequency shift map the blood ow in capillaries? People with good hearing can perceive sounds as low in level as -8.00 dB at a frequency of 3000 Hz. What is the intensity of this sound in watts per meter squared? Write the formula used. 3 pts