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Preview questions
1. What is the primary medium through which sound travels fastest?
Air · Water · Solid · Vacuum
2. Which of the following is NOT a characteristic of sound waves?
They can travel through a vacuum · They are longitudinal waves · They require a medium to travel · They can reflect
3. What is the frequency of a sound wave if it completes 10 cycles in 2 seconds?
5 Hz · 10 Hz · 20 Hz · 15 Hz
4. Which instrument is used to measure the frequency of sound?
Oscilloscope · Tuner · Decibel meter · Thermometer
5. What happens to the pitch of a sound as the frequency increases?
It decreases · It remains the same · It increases · It disappears
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