Final answer:
When a negatively charged balloon is placed against a non-conducting wall, the negative charges in the wall are attracted to the balloon.
Step-by-step explanation:
When a negatively charged balloon is placed against a non-conducting wall, the negative charges in the wall are attracted to the balloon. This is because opposite charges attract each other. Since the balloon is negatively charged, it will attract the positive charges in the wall, which are typically found in the atoms or molecules making up the wall.
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