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Roll a Can: Static Electricity
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Transcript
Roll a Can: Static Electricity
Supplies Needed!!
What To Do!
- An empty soda can
- Blown up balloons
- a head of hair
- water
How It Works
1) Place the can on it's side on a flat, smooth surface or table top
2) Rub balloon back and forth in hair really fast
3) Hold balloon next to can WITHOUT TOUCHING IT!
When you rub the balloons through your hair, invisible electrons ( with a negative charge) build up on the surface of the balloon. This is called static electricity, which means "non-moving electricity" The electrons have the power to pull very light objects ( with a positive charge) toward them.
Hair+balloon= Negative charge
Soda Can= Positive charge
Lets Think About It
1) Does the size of the balloon change the power of the pull?
2) Does the length of the persons hair effect the power of the static electricity?
3) How much water can you put in the can until the balloon can't pull it anymore?
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