Question

katie rubs a balloon against her hair. electrons from her hair travel to the balloon, giving the balloon a negative charge and her hair a positive charge. when the negatively charged balloon is brought near the strands of katies hair, they move to get closer to the balloon, without the balloon actually touching them. this shows that

a. electric attraction is a force that can act at a distance.
b. particles in the air must be pulling katies hair toward the balloon.
c. katies hair would move in this way with or without the balloon.
d. electric attraction is a force that can only act on contact.

Explanation:

The negatively - charged balloon attracts Katie's positively - charged hair without physical contact. This demonstrates that electric attraction can act over a distance. There is no indication that air particles are pulling her hair, and her hair wouldn't move like this without the charged balloon. Electric attraction here acts at a distance, not just on contact.

Answer:

A. electric attraction is a force that can act at a distance.