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- In physics, a phenomenon in which interaction
- between two surfaces of the same material in
- contact makes them cling together (with two
- different materials the similar phenomenon is
- called adhesion). According to kinetic
- theory, cohesion is caused by attraction
- between particles at the atomic or molecular
- level. Surface tension, which causes liquids
- to form spherical droplets, is caused by
- cohesion.
-