Final answer:
The tool used to conduct experiments with electric charges is the pith ball.
Step-by-step explanation:
The tool used to conduct experiments with electric charges is the pith ball. A pith ball is a lightweight, insulating object, typically made of a small piece of cork or polystyrene foam, that can be electrically charged by rubbing it with a cloth or other materials. It is commonly used in electrostatic demonstrations to study the behavior of charges.
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