When the negatively charged balloon is brought near the strands of katie's hair, they move to get closer to the balloon, without the balloon actually touching them. this shows that a. particles in the air must be pulling katie's hair toward the balloon. b. katie's hair would move in this way with or without the balloon. c. electric attraction is a force that can act at a distance. d. electric attraction is a force that can only act on contact.

I would think That the answer Is C.

The reason being is that when a rubber balloon is rubbed against human hair, electrons are transferred from the hair to the rubber, giving the balloon a net negative charge, and leaving the hair with a net positive charge. As the balloon is pulled away, the opposite charge on the hair causes it to be attracted to the balloon, And Katie's hair started to attract to the balloon before it even touched her. So this meant that a a specific distance, it would be able to attract.

a) the particles of the chair are strongly held together.