Explain why sound does not travel through vacuum.

Explanation

### Step-by-Step Solution:

1. **Understanding Sound Waves**:
Sound waves are classified as mechanical waves. This means they require a medium (solid, liquid, or gas) to travel through.

2. **Definition of Mechanical Waves**:
Mechanical waves are waves that need a medium to propagate. They cannot travel through a vacuum because there are no particles present to transmit the sound.

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