Consider two dipoles vec$($P$)\_(1)$ and vec$($P$)\_(2)$ separated by a distance d$.$ Find

the force between them due to the electrostatic interaction between the

two dipole moments, for arbitrary orientation of the directions of vec$($P$)\_(1)$

and vec$($P$)\_(2).$ For the special case in which vec$($P$)\_(1)$ is parallel to the direction

between the two dipoles, determine the orientation of vec$($P$)\_(2)$ which gives

the maximum attractive force.