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Frequency of a sound wave is measured in

APascal (Pa) only
BNewton (N) only
CJoule (J) only
DHertz (Hz)
Answer & Solution
Correct answer: D. Hertz (Hz)
1. Frequency is the number of vibrations per second. 2. 1 vibration per second = 1 hertz. 3. Newton is force, joule is energy, pascal is pressure. 4. So the unit of frequency is hertz. _Source: Selina Concise Physics Class 9, Ch 8 Sound (Mistral OCR'd PDF), section on terms of wave_
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