The water "bending" experiment
“Bending” water using static electricity
Research question: Does the distance between the stream of water and the balloon affect the degree of ”bend” of the water?
Materials: Water faucet, balloon, balloon pump, protractor, ruler,( camera)
Hypothesis: The closer the balloon is to the stream of water, the larger the degree of ‘bend’ of the water.
Variables:
Dependent: Degree of ‘bend’ of the water
Independent: Distance between the stream of water and the balloon
Constant: Size of the stream of water, size of the balloon, amount of static electricity produced, material of the balloon, amount of air pumped into the balloon
Short summary of research done on the area of investigation:
- Static electricity is developed and accumulated when two objects are rubbed against one another
- When they are rubbed together, electrons jump from one object to the other.
- Object that loses electrons become positively charged
- Object that gains electrons become negatively charged
- The balloon and your hair would both acquire opposite charges when rubbed together, causing the charge of the balloon to attract the molecules of water in stream.
- This can be done because the molecules in the stream can be moved easily, allowing the stream to bend towards the balloon
- Static electricity works better at a place with low humidity as at places with high humidity, the surface of objects are coated with a thin layer of water, which prevents electrons from jumping between the objects
Bibliography:
http://scifun.chem.wisc.edu/homeexpts/BENDWATER.html
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