{HEAD ~ The term impedance} involves {TAIL ~ both} of these aspects of the electrical properties of matter 
involves
{ HEAD ~ The term impedance } involves { TAIL ~ both } of these aspects of the electrical properties of matter
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH