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2006-10-15 4:08 am

Mike shows his friends a magic trick. He rubs a balloon on his head and then waves it over some bits of paper. What happens when he does this?

回答 (1)

Goon

2006-10-15 4:28 am

✔ 最佳答案

The bits of paper sticks to the balloon. This is caused by static electricity.

When you rub the balloon over your head, the electrons in your hair is transferred (or pulled) into the balloon. As a result the balloon is negatively charged. The negatively charged balloon can then be used to attract the neutral bits of paper.

This trick works best with dry hair, as water molecules can prevent the buildup of eletrical charges.

參考: my tiny brain

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