Please answer with explanation

II. Introduction. Everyone has, at some point, experienced the electrostatic force. Whether you are peeling the socks off the sweatshirt that just came out of the dryer, or your hair stands up when you run a comb through it, you are seeing and feeling the effects of the force between charges. It's also a cliche that "opposites attract," but in the case of electric charges, it happens to be true (and it is also true that like repels like). Attraction and repulsion are both easy to demonstrate. III. Activity: 1. Start with one person with their hands on the generator globe and make a circle with as many students as possible all holding hands. Then have the last student in the circle touch something grounded, like a faucet or desk. 2. Start by touching your hand in the van de graaf generator for a period of time. IV. Observation and discussion. 1. Why does your hair stand on end when you are touching the sphere? 2. If the day is especially humid, why is it much harder to make your hair stand up? 3. If the van de Graaff can generate literally thousands of volts, why don't you get electrocuted? Why, then, can the 110 volts of a household circuit injure or even kill you? 4. Would you still be safe if we replaced the insulating platform with a metal one? Explain