Why is the surface tension of paints and lubricating oils kept low?
Understand the Problem
The question is asking why the surface tension of paints and lubricating oils is maintained at a low level. This implies an exploration of the chemical properties and practical applications of these substances, focusing on how lower surface tension affects their behavior and functionality.
Answer
Low surface tension allows paints and lubricating oils to spread easily over large areas.
The surface tension of paints and lubricating oils is kept low to allow them to spread easily and quickly over large areas.
Answer for screen readers
The surface tension of paints and lubricating oils is kept low to allow them to spread easily and quickly over large areas.
More Information
Surface tension is the property of a liquid that allows it to resist an external force due to cohesive nature of its molecules. By reducing the surface tension, paints and lubricating oils can easily coat surfaces, improving their effectiveness.
Tips
A common mistake is assuming that higher surface tension is always better for spreading, which is not true. Lower surface tension facilitates spreading over surfaces by reducing cohesive forces.
Sources
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