In dry weather, when you comb your hair with a plastic comb, the hair will float with the comb. This is because the comb and hair are charged with ______ when they rub against each other.

In dry weather, when you comb your hair with a plastic comb, the hair will float with the comb. This is because the comb and hair are charged with different charges when they rub and attract each other. In fact, this process is attraction first and then repulsion, because after combing your hair with a comb, part of the hair is attracted and floats up. This is because part of the electrons are transferred, making the comb negatively charged and the hair positively charged. But at the same time, another part will fall, and finally all of it will fall. This is because the comb and the hair are now positively charged and start to repel.