Which of the following statements is an accurate description of vibrations?
a. neither...
Which of the following statements is an accurate description of vibrations?
a. neither ultrasonic nor infrasonic vibrations can be heard by humans.
b. the frequency of infrasonic vibrations is much too high to be heard by humans.
c. ultrasonic vibrations have a frequency lower than the range for normal hearing.
d. infrasonic vibrations are used in sonar equipment as well as to detect flaws in steel castings.
Answers: 2
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