A certain echocardiogram uses ultrasounds with a frequency f = 6.1130 MHz. The speed of sound in blood is 1570 m/s.

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October 13, 2020
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October 13, 2020

A certain echocardiogram uses ultrasounds with a frequency f = 6.1130 MHz. The speed of sound in blood is 1570 m/s.

A certain echocardiogram uses ultrasounds with a frequency f = 6.1130 MHz. The speed of sound in blood is 1570 m/s. The patient is aligned so that blood is flowing through the heart directly towards the transducer (the transducer produces and detects the ultrasound waves).

1. If blood flows through the artery being measured at a speed of 39.79 cm/s, what frequency signal would be detected by a red blood cell in the artery? Give your answer to four decimal places.

fdetected = _______MHz

2.What is the frequency of the signal that is returned to the transducer after being reflected from the red blood cell? Give your answer to four decimal places.

freflected = _______ MHz

3. What is the wavelength of the ultrasound wave travelling through the blood away from the transducer?

λ = _____ m

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