This causes the water molecules to rotate so that their positive ends are closer to the rod than their negative ends. Therefore the attractive force positive end of water molecule to negative rod is stronger than the repulsive force negative end of water molecule to negative rod and the water stream is attracted toward the rod shown above.
This demo can be done as a student activity. Different pairs of materials can be used e. Challenge students to predict what would happen if a positively charged rod were to be brought near the same stream of water. A positively charge can be produced by rubbing acetate with silk.
Some students may predict that the stream should be repelled away from the positively charged rod. In fact, the water stream is attracted by the rod because the negative oxygen ends of the water molecules are attracted to the positively charged rod. Never miss a resource. The Science Teachers Association of Ontario adds new resources, blog posts, videos and more on a regular basis. To make it a true experiment, you can try to answer these questions:. Does water temperature affect how much the water bends?
Does the size of the comb affect the static power? Does the amount of moisture in that air affect the static power? Try it after someone has taken a shower in the room. Does the material that the comb is made of affect the static power? However, hydrogen atoms encompass positive charge, and oxygen atom contains negative charge on them. As water is in a liquid state, there is a free flow of electrical charges, which eventually affects the static electricity produced.
No, the water temperature does not show any difference in producing static electricity and bending water. When you rub the balloon against your hair, the balloon becomes negatively charged. When a negatively charged balloon comes closer to the water stream, the likely charged ions move away and remain positively charged ions. These positively charged ions are more likely to negatively charged balloon and starts bending the water. Experiencing static electricity is common everywhere in our homes.
There are many ways to neutralize static electricity. Here are some: 1 Use dryer sheets for clothes to neutralize the charges build upon them 2 Apply moisturizers on the skin to balance the charges developed on the skin 3 Use hair spray for neutralizing charges on hairs 4 Freeze your garments to offset static electricity 5 Use misty hands if you want to touch charged objects. Static electricity is everywhere during winter months because there is dry air during colder months, making the accumulation of free electrons on skin and hair.
That is why humans feel tiny electric shocks when they touch any negatively charged objects like woolen bed sheets, other persons, etc. Rub your two hands against each other up and down and bring them closer to the water faucet. You will notice there is slight movement in the water stream. But make sure you drop down a very thin stream of water and dry hands.
The negatively charged electrons build up on the hands when rubbed against each other attracts the positive force of water when brought closer to it. In this way, our hands produce static electricity and bend water. Add Comment. Save my name, email, and website in this browser for the next time I comment. Post Comment. Choose nylon, not wood or metal. If you don't have a comb, a latex balloon works equally well.
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