Hello, I put two strips of cellophane tape adjacent to each other adhered onto a table. When I pull them both apart, they repel each other, both insulators ripped electrons from the wood. When I stack two strips of tape on top of each other on a table, rip the combined bundle off the table, my experiment shows that the combined piece is negatively charged on each side. Yet, when I then rip this combined piece into its two constituents pieces, they attract to each other, the top piece immediately becomes positive, the bottom piece retains its negativity. This last step is not immediately obvious to me. The best answer I can come up with is that more charged is ripped of the bottom sticky cellophane side from the table but less is ripped off from the top cellophane side from the non-stick bottom cellophane side, giving a net positive charge to the top cellophane tape and net negative to the bottom cellophane tape. Is that right? I draw the ideas on paper but there is always a handy-wavy gap of knowledge about how the charges distribute one step to the other. People draw these stacks as net positive and net negative yet I draw layers of positive and negative. P.S. When I pull two stacked pieces of tape off of a table, do the negative charges equally distribute?