Q) If the velocity of blood flow in the aorta is about (0.32 m/s) , what pulse frequency would you expect if a (4.3 MHz) simeq ultrasound was directed along the blood flow and the waves were reflected from the red blood cells? Assume that waves travel at a speed of (1.54*10^3 m/s)

Q) If the velocity of blood flow in the aorta is about (0.32 m/s) , what pulse frequency would you expect if a (4.3 MHz) simeq ultrasound was directed along the blood flow and the waves were reflected from the red blood cells? Assume that waves travel at a speed of (1.54*10^3 m/s)

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter14: Vibrations And Waves

Section: Chapter Questions

Problem 66A

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Concept explainers

Shock Waves

Shock waves are common in continuum mechanics, and their dominance is attributable to the fact that they are stronger (or even less) compressible. Substantial perturbations propagated as sudden dynamic changes of a compressible medium supersonically. Shock waves are all around us in our daily lives. Lightning, earthquakes, volcanic eruptions, and meteorite impact all produce them in nature. Even the earth, which is protected by its magnetic field, generates a shock wave as in solar wind that travels around 20 Earth radiuses. These shock waves might be either constant, linked to the body, or unsteady, i.e., moving around with time. All of the shocks mentioned above can be damaging, so precautions must be taken to reduce their impact.

Question

Q) If the velocity of blood flow in the
aorta is about (0.32 m/s),
pulse frequency would you expect if
a (4.3 MHz) simeq ultrasound was
directed along the blood flow and
the waves were reflected from the
red blood cells? Assume that waves
travel at a speed of (1.54*10^3 m/s)
what

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