Wetting

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Wetting

Wetting (pronunciation: /ˈwɛtɪŋ/) is a phenomenon in physics and chemistry that describes the spread of a liquid on a solid substrate. This process is governed by the balance of adhesive and cohesive forces.

Etymology

The term "wetting" originates from the Old English "wætan", which means to make wet.

Definition

Wetting is the ability of a liquid to maintain contact with a solid surface, resulting from intermolecular interactions when the two are brought together. The degree of wetting (wettability) is determined by a force balance between adhesive and cohesive forces.

Related Terms

  • Adhesion: The tendency of dissimilar particles or surfaces to cling to one another.
  • Cohesion (physics): The component of the intermolecular force that acts between two like molecules.
  • Surface tension: A property of the surface of a liquid that allows it to resist an external force.
  • Capillary action: The ability of a liquid to flow in narrow spaces without the assistance of, or even in opposition to, external forces like gravity.

Wetting in Medicine

In medicine, wetting is often referred to in the context of enuresis, or involuntary urination. It can also refer to the process of moistening a contact lens before insertion into the eye.

See Also

External links

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