Home / Series / BrainStuff (Podcast) / Aired Order / Season 2014 / Episode 40

What do the yellow and black wires in a home telephone jack do?

English
  • Originally Aired May 14, 2014
  • Runtime 10 minutes
  • Content Rating United States of America TV-G
  • Created July 5, 2019 by
    Administrator admin
  • Modified July 5, 2019 by
    Administrator admin