A student placed a disk magnet on top of the battery to make a simple motor. When the coil was given a gentle spin it kept turning on its own. Which stamens best explains how this motor works?

Calculate the ph at the equivalence point for the titration of a solution containing 150.0 mg of ethylamine (c2h5nh2) with 0.1000 m hcl solution. the volume of the solution at the equivalence point is 250.0 ml. kb forethylamine is 4.7 × 10−4 .