Multiple Choice
A sound wave is __________________________
A) a variation in air pressure at a point in the range 20 Hz to 20 kHz.
B) an audio signal
C) an electromagnetic wave in the air
D) a vibration of atoms
Correct Answer:
Verified
Correct Answer:
Verified
Related Questions
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Q4: The speed of sound is _.<br>A) about
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Q12: Sound pressure drops _ dB each time
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