asticity & Waves 19. What is the time required for one complete vibration of an ultrasonic stethoscope that operates at a frequency of 2.0 MHz? 20. Calculate the wavelengths of the lowest and highest frequency sounds normally audible to humans (20 and 20,000 Hz), given the speed of sound to be 344 m/s. 21. What is the frequency of ultrasound with a wavelength of 0.25 mm in tissue if the speed of sound in tissue is 1540 m/s?
asticity & Waves 19. What is the time required for one complete vibration of an ultrasonic stethoscope that operates at a frequency of 2.0 MHz? 20. Calculate the wavelengths of the lowest and highest frequency sounds normally audible to humans (20 and 20,000 Hz), given the speed of sound to be 344 m/s. 21. What is the frequency of ultrasound with a wavelength of 0.25 mm in tissue if the speed of sound in tissue is 1540 m/s?
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19. What is the time required for one complete vibration of an ultrasonic stethoscope that
operates at a frequency of 2.0 MHz?
20. Calculate the wavelengths of the lowest and highest frequency sounds normally audible
to humans (20 and 20,000 Hz), given the speed of sound to be 344 m/s.
21. What is the frequency of ultrasound with a wavelength of 0.25 mm in tissue if the speed
of sound in tissue is 1540 m/s?
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