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hi itamp;#39;s mr. Andersen and this is ap physics essentials double-oh-seven positive and negative charges imagine I take a balloon that doesnamp;#39;t have a charge and I rub it on my head Iamp;#39;m now giving it a charge so I can move it up to something neutral like a wall and if I let it go itamp;#39;ll just stay there now imagine if I take another balloon and I charge that in a similar manner it should have the same charge as the balloon and so if I hold it up next to it and let it go whatamp;#39;s going to happen itamp;#39;ll actually be repelled by that object and so scientists speculated there are two types of charges and we call those positive and negative charges and so an electric charge can be positive or negative if we have a neutral object itamp;#39;s going to have an equal amount of each of those different charges but if itamp;#39;s a charged object like a balloon then itamp;#39;s going to have differences in the number of electric charges that it has if itamp