Demos Elmo Two pennies Three charges in a plane Hanging path ball Need a female teacher to come forward. How does this gadget produce a

Demos Elmo Two pennies Three charges in a plane Hanging path ball Need a female teacher to come forward. How does this gadget produce a mini-lightning bolt? What upward forces are keeping your hair up? How are these forces produced? Why do the hair strands spread out from each other? Why do they spread out radially from the head? Is hair a conductor or insulator? How can we find out?