c) [ A Doppler ultrasound is used to measure the motion of blood in a patient's artery. The probe has a frequency of 5.6 MHz, and the maximum frequency shift on reflection is 480 Hz. What is the maximum speed of the blood in the artery if the artery makes an angle 25° with the beam? [speed of sound in human tissue is 1540 m/s] [Answer in 2 significant figures]
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- A Moving to another question will save this response. Question 2 If the speed of sound in air at 0 °C is 331 m/s. What will be the speed of sound in air at 50 °C? 299 m/s 142 m/s 331 m/s 360 m/s None of these. AMoving to another question will save this response. ch 45As you zip through space in your PPS (personal propulsion suit), your pulse rate as you count it is 121 bpm (beats per minute). This high pulse rate serves as objective evidence of your excitement. However, an observer on the Moon, an expert in pulse rate telemetry, measures your pulse rate as slower. In fact, she detects only 0.561 times the rate you count and claims that you must be pretty calm in spite of everything that is going on. How fast are you moving with respect to the Moon?A wave has a frequency of 1.9 kHz.(a) What is the frequency in Hz?(b) What is the period of this wave in seconds?(c) What is the period of this wave in microseconds?
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- A rocket on the ground vibrates at an audible frequency of 486 Hz. What is the frequency heard by an observer while the rocket is in flight and recedes away at 247 m/s from the stationary observer?You place your ear onto a steel railroad track and hear the sound of a distant train through the rails Δt = 2.7 seconds before you do through the air. The speed of sound in steel is vs = 6100 m/s, and and the air temperature is 36° C. Find the distance, D, to the train in meters.Speed of sound (vo) in dry air at 0°C is 331 m/s. Therefore, at room temperature (23°C) the speed (vT) will be O [331 x 296) /273)] m/s O [(331 x 23) /273] m/s O [331/(296/273)] m/s V[331 (23/273)] m/s
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