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van der Waals force |
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van der Waals force [′van dər ‚wȯlz ‚fȯrs] (physical chemistry) An attractive force between two atoms or nonpolar molecules, which arises because a fluctuating dipole moment in one molecule induces a dipole moment in the other, and the two dipole moments then interact. Also known as dispersion force; London dispersion force; van der Waals attraction. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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These hairs, when in close contact with a surface, induce intermolecular attractive forces called van der Waals forces between themselves and the surface (SN: 7/15/00, p. This mock dirt counteracted the weak van der Waals forces that usually sum into a lizard's tenacious grip on surfaces. In a liquid film thinner than about 100 nm, intermolecular attractions called van der Waals forces tend to squeeze the film so much that it disappears with a pop, says Dorbolo. |
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