Straw and a can. All
you need to you tame a can.
Take a plastic straw
and rub on your shirt or in your hair. On the table lay empty an empty can of juice. Lay
it on its side and make sure it's still. Hold the straw parallel to the axis of the tins.
Make sure the straw does not touch the can -the straw should be about one centemetre away from the can. As you move the straw, the can should follow it like an obedient dog.
Why is this so?
Physics tells us that when you rub the straw it becomes electrically charged. When we move the straw towards the metal can, the electrons in the metal rush to the surface of the can and are attracted to the opposite charge of the straw by electrostatic attraction i.e. positive (+) and negative (-) charges are attracted to each other.
Physics tells us that when you rub the straw it becomes electrically charged. When we move the straw towards the metal can, the electrons in the metal rush to the surface of the can and are attracted to the opposite charge of the straw by electrostatic attraction i.e. positive (+) and negative (-) charges are attracted to each other.
An example is located approximately in the 30th second of video.
Sources:
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