It can be described by a traceless tensor, whose components are equal to a weighted integral of "three x sub i x sub
It can be described by a traceless tensor, whose components are equal to a weighted integral of "three x sub i x sub j" minus r squared times the Kronecker delta function. Because there is no such thing as negative mass, the lowest order gravitational waves should be of this type. The potential energy of an electrostatic one of them is proportional to the gradient of the external electric field, while the total power radiated by an oscillating one of these is proportional to the frequency to the sixth power. In particle accelerators, magnets of this type are used to focus beams, while electric fields of this type fall off like one over distance to the fourth power. FTP, identify this term which can describe a distribution of two positive and two negative charges.
It can be described by a traceless tensor, whose components are equal to a weighted integral of "three x sub i x sub
quadrupole (accept quadrupole moment)