Sound Quiz
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5 questions, one answer each
Each answer is checked as you go, with why.
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1. What type of wave is a sound wave?
- A. Transverse
- B. Longitudinal
- C. Electromagnetic
- D. Standing
2. What is the approximate frequency range of human hearing?
- A. 2 Hz to 2,000 Hz
- B. 20 Hz to 20,000 Hz
- C. 200 Hz to 200,000 Hz
- D. 2,000 Hz to 2,000,000 Hz
3. What does the amplitude of a sound wave determine?
- A. Its pitch
- B. Its loudness
- C. Its speed
- D. Its wavelength
4. An oscilloscope trace shows a sound wave with a time period of 0.002 s for one complete cycle. What is the frequency of the sound?
- A. 50 Hz
- B. 200 Hz
- C. 500 Hz
- D. 2000 Hz
5. Two students measure the speed of sound in air by standing 400 m apart; one claps and the other times the delay before hearing it. Why is using a large distance (rather than a short one) important for accuracy?
- A. It makes the clap sound louder
- B. It reduces the effect of the timer's reaction-time error on the calculated speed
- C. It removes the need to repeat the experiment
- D. It changes the speed of sound to be measured