A Demonstration of Dipole-Dipole Interactions An easily assembled overhead projection demonstration af dipole-dipole interactions can be made by using s t r i ~of s flexible magnetic tape.' Thismaterial has an adhesive side covered hy white plastic which may be written on fur the lecturer's use. T h e magnets in the strip are not lined up exactly perpendicular to thestrip, thus t h e a t tractions and reoulsions a t the sides of the strio are very slieht compared to those
