Question 20 2 pts What distance must separate two point charges of 66.4 nC in order to have a force of 1.05 N between them? Please give the distance in mm. Question 21 2 pts What is the period of a wave? The time that a wave takes to complete one cycle The time that a wave takes to complete a half cycle The time that a wave takes to complete a quarter cycle The time that a wave takes to complete two cycles The time that a wave takes to complete four cycles Question 22 2 pts In the region just outside the south pole of a magnet, the magnetic field lines... O point toward the south pole. are more concentrated than at the north pole. O are less concentrated than at the north pole. O go around the south pole. O point away from the south pole