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dipole moment

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dipole moment [′dī‚pōl ‚mō·mənt]
(electricity)
(electromagnetism)
(physical chemistry)
The vector sum of the bond moments in a molecule, a measure of the polarity of the molecule.

Dipole moment

A mathematical quantity characteristic of a dipole unit equal to the product of one of its charges times the vector distance separating the charges. The dipole moment μ associated with a distribution of

() 
electric charges qi is given by where r i is the vector to the charge qi. For systems with a net charge (for example, positive), the origin is taken at the mean position of the positive charges (and vice versa). Dipole moments have the dimensions coulomb-meters. Molecular dipole moments were previously expressed in debye units, where 1 debye = 3.336 × 10-30 C · m. See Dipole



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To gain an improved understanding of the mechanisms contributing to the dipole moment collapse, Lijun Liu, from California Institute of Technology, and Peter Olson from Johns Hopkins University, US, have performed numerical calculations to show that mixing in Earth's outer core is the culprit.
Changing the dipole moment changes the layer's stability and its relationship with water, the researchers say.
Meanwhile, we calculated the dipole moment and charge density of the trail phenyl in the biphenyl side chains, as shown in Table 1.
 
 
 
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