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MacCullagh's formula |
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MacCullagh's formula [mə′kəl·əz ‚fȯr·myə·lə] (physics) A formula for the potential due to a distribution of mass or charge at an external point: the potentialVat a pointPresulting from a distribution of mass or positive charge centered about a pointOisV= (kM/r) + (k/2r3)(A+B+C- 3I) +O(1/r4), whereris the distance fromOtoP,kis the gravitational or electrostatic constant,Mis the total mass or charge,A,B, andCare the principal moments aboutO,Iis the moment aboutOP, andO(1/r4) is a quantity that falls off at least as rapidly as 1/r4. 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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