Frictions between highly smooth surfaces is _________.

Answer

**Step-by-Step Solution:**

1. **Understanding Friction**: Friction is the resistance that one surface or object encounters when moving over another. It depends on the nature of the surfaces in contact.

2. **Identifying Surface Characteristics**: The question specifically refers to "highly smooth surfaces." Smooth surfaces have fewer irregularities compared to rough surfaces.

3. **Molecular Interaction**: When two highly smooth surfaces come into contact, a large number of molecules from both surfaces interact with each other.

4. **Formation of Bonds**: Due to the close proximity of the molecules on these smooth surfaces, they can form a significant number of bonds. These bonds are what create the resistance to motion, which we perceive as friction.

5. **Conclusion**: Since a large number of bonds are formed between the molecules of the two surfaces, the friction between highly smooth surfaces is **high**.

**Final Answer**: Friction between highly smooth surfaces is **high**.

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