I figured out what to do with the wire question. We were missing a huge part of the question which was the length of the whole wire. Check out the slide on that question. It was definitely more intense than I thought it would be, so don't expect a question like it tomorrow.
This video also has some great applications with explanations on how to do them: Answers are included in the extra review. It is extra and not required, but I think it will help you while studying. Feel free to skip around, I did add some challenging questions. Focus on what you need and you can also use Khan as well.
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