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1. A polyester fleece sweater in a clothes dryer will acquire a static charge in the hot, dry environment of the dryer. When you reach into the dryer to get the garment, it is common to feel the hairs on your arms standing up. It would not be unusual to take a fleece sweater out of the dryer and find a sock stuck to it. There may be a crackling noise when the sock is pulled off. Explain these effects.

2. What does the voltage of a battery measure? Why would high voltage batteries be neccessary in some situations?

3. What is a short circuit? Why is a short circuit dangerous?

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