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Question
Ultrasound has frequency of vibration
Options
between 20 and 20,000 Hz
below 20 Hz
above 20,000 Hz
between 500 and 10,000 Hz
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Solution
above 20,000 Hz
Explanation:
Ultrasound has frequency of vibration above 20000 Hz.
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RELATED QUESTIONS
The sketches I to IV in following Figure show sound waves, all formed in the same time interval.
 |
 |
| I | II |
 |
 |
| III | IV |
Which diagram shows
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