Both decca and loran used to determine location.

Both Decca  and loran  used  Radio  signal  to  determine   location.The  decca  navigator  system  was  a   hyperbolic  radio  navigation  system  which  allow  ship  and   aircraft  to   determine  their  position by  receiving  radio  signals.  Loran  receives  connect  with  at   least   three  transmitting  station.

Particle exchange energy though elastic collision , hope this .

The teacher is mostly talking about the distillation of a mixture