A lubricant is a substance that reduces friction between surfaces that are in contact, thereby facilitating easier movement and reducing wear and tear. Lubricants can be classified into several categories based on their composition and use: 1. **Types of Lubricants**: - **Liquid**: Common lubricants include oils (mineral oils, synthetic oils, and biodegradable oils) and greases (which are oil-based thickened with a soap).
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