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Results so far
Why do the pieces of tape push away from each other?
Here's how kids have voted so far:
Pie chart representing percentages at right 20% air pressure pushes them

52% they have the same electrical charge on them

27% they have different electrical charges on them

sneak peek
How's it work?
When you pull the tape out of the dispenser, there's a screech. The noise means that there's some rubbing, or friction. Rubbing plastic can give it an electric charge. Both pieces of tape have the same kind of electric charge and they repel each other.

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