Physics

Ultrasound reflected from an oncoming bloodstream that is moving at 30 cm/s is mixed with the original frequency of 1.3 MHz to produce beats. What is the beat frequency? (Velocity of sound in blood = 1540 m/s.)

Beat frequency = Hz

HELP: This problem involves two Doppler shifts.

HELP: In the first shift, the source is fixed and the observer is the moving blood. Why?

HELP: In the second shift, the source is the moving blood and the observer is fixed. Why?

HELP: It might be helpful to think of a tiny ultrasound recorder mounted on a blood cell. The recording happens when the ultrasound arrives at the cell, and the echo leaves when the recorded sound is "played back".

HELP: Once you know the frequency of the Doppler-shifted echo, how do you find the beat frequency between the echo and the original frequency?

  1. 👍
  2. 👎
  3. 👁

Respond to this Question

First Name

Your Response

Similar Questions

  1. Health And Physical Ed

    1. during the exchange of air in your lungs, oxygen is being taken into your bloodstream while this substance is being released microorganisms carbon dioxide*** plasma mucus 2. the gas exchange of oxygen to the bloodstream takes

  2. Physics

    Blood flow rates in the umbilical cord can be found by measuring the Doppler shift of the ultrasound signal reflected by the red blood cells. If the source emits a frequency f, what is the measured reflected frequency fR? Assume

  3. Mathematics

    Right △ABC has coordinates A(-7, 3), B(-7, 10), and C(-1, 3). The triangle is reflected over the x-axis and then reflected again over the y-axis to create △A'B'C'. Which are the coordinates of vertex A'?

  4. Physics

    A diagnostic sonogram produces a picture of internal organs by passing ultrasound through the tissue. In one application, it is used to find the size, location, and shape of the prostate in preparation for surgery or other

  1. Math

    Context: there is no pictures except for one question 1. D (9, -8) is reflected to D’ (9, 8). 1 point A. x axis B. y axis 2.A figure is reflected from Quadrant II to Quadrant III. A. x axis B. axis 3. Point T (-7, -1) is

  2. Biology

    If everything above 50% of light energy reflected is visible to the human eye, is red light part of the mixture of colors seen in light reflected by chlorophyll? Explain your answer.

  3. Physics

    A car sounding its horn (rated by the manufacturer at 600 Hz) is moving at 20 m/s toward the eat. A stationary observer is standing due east of the oncoming car. a) What frequency will he hear assuming that the speed of sound is

  4. physics

    Dolphins can hear ultrasound with frequencies up to 280 kHz. What is the speed of sound in water if the wavelength of ultrasound with a frequency of 2.80 × 10^5 Hz is 0.510 cm? How long would it take this sound wave to travel to

  1. Civics

    In what way do mixed and market economies support the ideals of democracy? A. Mixed and market economies elect a few farmers and local leaders to choose which goods and services to produce. B. Mixed and market economies do not

  2. Geometry

    The vertices of ∆ABC are A (-2,5), B(-2,4), and C(-5, 3). If ∆ABC is reflected across the line y=-2 to produce the image ∆A’B’C, find the coordinates of the vertex A’ if ∆ABC is reflected across the line x= -2.

  3. Pre-Calc

    The concentration C of a chemical in the bloodstream t hours after injection into muscle tissue is C=(3t+t)/(t^3+50) a. determine the horizontal asymptote of the function and interpret its meaning in the context of the problem. b.

  4. Physics

    A Doppler blood flow meter emits ultrasound at a frequency of 5.0 MHz. What is the beat frequency between the emitted waves and the waves reflected from blood cells moving away from the emitter at 0.15m/s? Assume that

You can view more similar questions or ask a new question.