A drop of liquid under no external forces is always ........in shape.

Answer

To solve the question "A drop of liquid under no external forces is always ........ in shape," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Concept of Surface Tension**:
- A drop of liquid is influenced by the property of surface tension, which is the tendency of the liquid's surface to minimize its area.

2. **Identifying the Effect of Surface Tension**:
- Surface tension causes the liquid to contract and take a shape that has the least surface area for a given volume.

3. **Determining the Shape with Minimum Surface Area**:
- Among all possible shapes, the sphere has the least surface area for a fixed volume. This is a fundamental property of geometry.

4. **Conclusion**:
- Therefore, when a drop of liquid is not subjected to any external forces, it will naturally take the shape of a sphere to minimize its surface area.

### Final Answer:
A drop of liquid under no external forces is always **spherical** in shape.

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