Recent content by rvr1974

  1. R

    High School Is it possible to create a negative charge in fabric?

    Hi, I was wondering whether it was possible to create a predominant negative charge in fabric. Anyone have any ideas?
  2. R

    Mechanism with up and down movement?

    Hi ... I was trying to figure out a mechanism which allows for up and down movement. I figured a piston with crankshaft... anyone has any other possibilities? Thanks