{HEAD ~ A student} is thus able to study magnetic fields, electromagnetic forces, and {TAIL ~ their interaction} through use of this device 
is able to study
{ HEAD ~ A student } is thus able to study magnetic fields , electromagnetic forces , and { TAIL ~ their interaction } through use of this device
HEAD HEAD HEAD HEAD HEAD HEAD REL OTH REL REL REL OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH