A drop of liquid unde no external force, is always spherical in shape. Why?

Explanation

To understand why a drop of liquid, when undisturbed by external forces, takes on a spherical shape, we can break down the explanation into a series of logical steps:

### Step-by-Step Solution:

1. **Understanding Surface Tension**:
- Surface tension is a physical property of liquids that arises from the cohesive forces between liquid molecules. It is defined as the force per unit length acting along the surface of a liquid.

2. **Cohesive Forces**:
...