1. Sound is a type of:
Answer:
Explanation:
Sound is a mechanical wave because it requires a medium to propagate. It’s also a longitudinal wave because particles of the medium move parallel to the direction of wave propagation.
2. The speed of sound is the highest in:
Answer:
Explanation:
Sound waves travel faster in solids compared to liquids and gases. Among the given options, steel, being a solid, conducts sound the fastest.
3. Which of the following factors affects the speed of sound?
Answer:
Explanation:
The speed of sound can be influenced by various factors including temperature, humidity, and pressure.
4. The number of vibrations per second of a sound wave is called its:
Answer:
Explanation:
The frequency of a wave refers to the number of oscillations or vibrations it completes in one second.
5. The human ear is most sensitive to frequencies in the range of:
Answer:
Explanation:
The average human ear can hear frequencies ranging from 20 Hz to 20 kHz, with the most sensitive range being from 2 kHz to 5 kHz.
6. Ultrasound waves have frequencies:
Answer:
Explanation:
Ultrasound waves have frequencies higher than the audible range for humans, which means they are above 20 kHz.
7. Which property of sound determines its pitch?
Answer:
Explanation:
The pitch of a sound is determined by its frequency. Higher frequencies are perceived as higher pitched sounds and vice versa.
8. The loudness of sound is determined by its:
Answer:
Explanation:
The amplitude of a sound wave determines its loudness or volume. Larger amplitudes are perceived as louder sounds.
9. In which of the following mediums does sound not travel?
Answer:
Explanation:
Sound requires a medium to propagate. In a vacuum, where there are no particles to vibrate, sound cannot travel.
10. The phenomenon where sound waves bounce back after striking a hard surface is called:
Answer:
Explanation:
When sound waves hit a hard surface, they can bounce back. This phenomenon is known as the reflection of sound.