Two charged particles attract each other with a force of magnitude F. If the distance between the charges is made 2.2 times as large and the charge on one of the particles is made 2.2 times as big, what is the ratio of the new F to the old one?

Two rigid transformations are used to map δhjk to δlmn. the first is a translation of vertex h to vertex l. what is the second transformation? a reflection across the line containing hk a rotation about point h a reflection across the line containing hj a rotation about point k