AC/DC
It boils down to money. You can use smaller transmission line and dial down the voltage for consumers. You can also run long distances because of the higher voltage. DC is not as practical because of the size of line required to carry the current. You also can't use transformers with DC, you need to use resistors to slow the current.
Lesson plans
I really liked the velocity and motion labs we did today. They were hands on and fun, but also used math. It helps that it is math that I am more familiar with. I was not as intimidated by the math involved.
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