Recent content by SuperAcid

Thanks for the reply, but: How do you know this ? Is it derived from an equation?

In an experiment I am carrying out I am levitating metal rings using a solenoid with a clamp stand going through the solenoid acting as a support for the ring and a core for the solenoid (seen in the attachment). I have one simple question? Theorectically, should an Aluminium or Copper ring...