Mary touched the van de graaff generator and all her hair stood on end. the charge from the generator was transferred to mary's hair so all of the strands had the same + charge. her hairs all repelled each other and stood on end like you see here. this illustrates what law?

Given situation illustrates law of attraction.

Explanation:

According to the law of attraction opposite charges attract each other and like charges repel each other.

So, when charge from the generator was transferred to Mary's hair then all of them acquire a positive charge. As all of them have a similar charge so, they used to repel each other.

This repulsion of like charges is known as law of attraction.