Why are these waves mentioned in (i) above, not audible to us?

Explanation

To answer the question "Why are these waves mentioned in (i) above, not audible to us?", we can break down the solution into clear steps:

### Step-by-Step Solution:

1. **Understanding Sound Waves**:
- Sound waves are mechanical waves that travel through a medium (like air, water, or solids) and can be perceived by the human ear.

2. **Frequency Range of Human Hearing**:
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