amplitudes are associated with sounds. A) higher; quieter B) higher; louder C) higher; weaker D) lower; louder
The correct answer and explanation is:
Correct Answer: B) higher; louder
Explanation:
Sound is a type of energy created by vibrations, which travel in waves through a medium (like air, water, or solids). One of the main properties of sound waves is amplitude, which refers to the height of the wave from its resting position. The amplitude of a sound wave determines its loudness.
- Higher amplitude means the wave carries more energy. This results in louder sounds.
- Lower amplitude means the wave carries less energy. This results in quieter or softer sounds.
To better understand this, imagine hitting a drum:
- If you strike it hard, it vibrates more intensely. The sound wave created has a higher amplitude, and you hear a louder sound.
- If you tap it gently, the vibration is smaller, resulting in a lower amplitude, and you hear a softer sound.
It’s important not to confuse amplitude with frequency, which determines the pitch of the sound (how high or low a note sounds). Amplitude strictly affects loudness.
Here is a summary of the relationship:
- Amplitude ↔ Loudness
- Frequency ↔ Pitch
In the context of the question:
- Choice A (“higher; quieter”) is incorrect because higher amplitudes make sounds louder, not quieter.
- Choice C (“higher; weaker”) is wrong because a higher amplitude corresponds to a stronger, not weaker, sound.
- Choice D (“lower; louder”) is the opposite of what is correct.
Therefore, the correct answer is:
B) higher; louder
This means greater amplitude leads to increased loudness, which is a basic principle of sound wave physics.