PHYSICS HIGH SCHOOL

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

Answer 1
Answer: So we want to know what statement is an accurate description of vibrations. So humans can hear sound frequencies from 20-20000 Hz. Below 20 Hz is infra sound and above 20000 Hz is ultra sound. Humans cant hear both infra sound and ultra sound so the correct answer is A.
Answer 2
Answer:

Infrasonic and ultrasonic vibrations can’t be heard by humans because they’re outside of the range of frequencies that can be detected. Infrasonic vibrations have a lower frequency than can be heard by the human ear; ultrasonic vibrations have a higher frequency than can be heard by the human ear. Infrasonic vibrations can be felt if the amplitude is great enough. Ultrasonic vibrations are utilized in sonar equipment and in applications to detect flaws in steel castings and to remove grease or foreign material from machine-part surfaces.

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Answers

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Answers


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Answers

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Answers

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Answers

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Answers

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