Sound Multiple Choice Questions and Answers 23 PDF Download
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MCQ on Sound Worksheets 23 Quiz PDF Download
MCQ: Multiple reflections are called
MCQ: SONAR ranging is also used to see object's
- both size and shape
- none of the above
MCQ: Wavelength of ultrasonic waves is
- very small
- very large
MCQ: Frequency range for ultrasound is
- 20,000 Hz above
- less than 20,000 Hz
- 25,000 Hz
- less than 20Hz