Ultrasound that has a frequency of 2.50 MHz is sent toward blood in an artery that is
Question:
Ultrasound that has a frequency of 2.50 MHz is sent toward blood in an artery that is moving toward the source at 20.0 cm/s, as illustrated in Figure 17.46. Use the speed of sound in human tissue as 1540 m/s. (Assume that the frequency of 2.50 MHz is accurate to seven significant figures.)
a. What frequency does the blood receive?
b. What frequency returns to the source?
c. What beat frequency is produced if the source and returning frequencies are mixed?
Strategy
shift. The last question asks for beat frequency, which is the difference between the original and returning frequencies.
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Solution for a 1 Identify knowns The blood is a moving observer and so the frequency it receives is ...View the full answer
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