Rub the plastic ruler with dry paper. Move the ruler to your scalp without touching it. Explain the result of the experiment.

As a result of electrification through the influence, the hair will begin to be attracted to the ruler.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.