Doppler uses ultrasound to measure blood flow velocities. Assume that the device emits sound at a frequency of 3.2MHz, and that the speed of sound in human tissue is 1540 m/s What is the expected pulse rate if blood flows in the arteries of the large leg at a speed of 3) cm/s away from the source of the sound

Doppler uses ultrasound to measure blood flow velocities. Assume that the device emits sound at a frequency of 3.2MHz, and that the speed of sound in human tissue is 1540 m/s What is the expected pulse rate if blood flows in the arteries of the large leg at a speed of 3) cm/s away from the source of the sound

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

A person shouting at the top of his lungs emits about 1.0 W of energy as sound waves. What is the sound intensity level 1.0 m from such a person?
A Doppler flow meter uses ultrasound waves to measure blood-flow speeds. Suppose the device emits sound at 3.5 MHz, and the speed of sound in human tissue is about 1540 m/sWhat is the expected beat frequency if blood is flowing in large leg arteries at 3.0 m/s directly away from the sound source?
A submarine emits a sonar pulse, which returns from an underwater cliff in 1.02 s. If the speed of sound in salt water is 1531 m/s, how far away is the cliff?
If the vocal tract of a human is considered a closed tube 17 cm in length, what is the frequency of what would become the second harmonic? Consider 340 m/s as the speed of sound. The answer must be in Hz units.
A bat emits a sound whose frequency is 81.8 kHz. The speed of sound in air at 20.0 oC is 343 m/s. However, the air temperature is 41.8 oC, so the speed of sound is not 343 m/s. Assume that air behaves like an ideal gas, and find the wavelength of the sound.
For years, marine scientists were mystified by sound waves detected by underwater microphones in the Pacific Ocean. These so-called T-waves were among the purest sounds in nature. Eventually they traced the source to underwater volcanoes, whose rising columns of bubbles resonated like organ pipes. What is the wavelength of a typical T-wave whose frequency is 7 Hz? (The speed of sound in seawater is 1530 m/s.)
Two eagles fly directly toward one another, the larger eagle at a speed of 15.0 m/s and the smaller one at a speed of 20.0 m/s. Both eagles screech, the larger emitting a screech of frequency of 3 200 Hz and the smaller one emitting a screech of frequency 3 800 Hz. The speed of sound in the air around the eagles is 330 m/s. What is the frequency of the screech heard by the larger eagle? Group of answer choices
A hiker shouts towards a vertical cliff that is 465 m away. The echo is heard 2.75 s later. What is the speed of sound of the hiker's voice in air?
Deep ultrasonic heating is used to promote healing of torn tendons. It is produced by applying ultrasonic sound over the affected area of the body. The sound transducer (generator) is circular with a radius of 1.46 cm, and it produces a sound intensity of 6.53 × 103 W/m2. How much time is required for the transducer to emit 3910 J of sound energy?
Bats of the Vespertilionidae family detect the distance to an object by timing how long it takes for an emitted signal to reflect off the object and return. Typically they emit sound pulses 3.00 ms long and 70.0 ms apart while cruising. When an object is only 36.7 cm away, how long will it be before the echo is heard?
A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies of sound by 30.0 dB. The hearing aid picks up sound having a frequency of 100 Hz and an intensity of3.9e-10 W/m22. What is the intensity delivered to the eardrum?
A pin with a mass of 0.15 g falls from rest on a table 1.0 m high.When striking the ground, 0.02% of the pin's kinetic energy is converted into a 0.10 s sound pulse that is emitted in all directions.If the background noise intensity is 1.0x10-8W/m2, how far can a person be to hear the sound of the pin dropping.