Why our hands slip on oily surfaces more than they do on dry surfaces?

Explanation

To understand why our hands slip on oily surfaces more than they do on dry surfaces, we can break down the explanation into several steps:

### Step-by-Step Solution:

1. **Understanding Surface Irregularities**:
- Surfaces are not perfectly smooth; they have tiny bumps and grooves known as irregularities. These irregularities play a crucial role in how objects interact with each other.

2. **Friction and Surface Interaction**:
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