Electricity and Magnetism

1. Daniel Miranian
   Period-2
   Journal 4-1
   
   I. I found out that we spend about $150 a year on hot water. This does not seem like that much money, but when you add up the cost of other appliances, powering your home can get fairly expensive.
   
   II. This past week in class we finished up the Rube Goldberg devices. Then later on in the week we started talking about electricity and magnetism. The first day we just talked about what we already knew about this subject. We also researched wind turbines and how they work. The last day in class we talked about how generators work. I thought it was interesting to learn about the difference in the electromagnetic field of a DC and an AC. I had always known what the difference was between an AC and DC circuit but I had never really understood how an AC current worked.
   
   III. For next week in class I would like to find out more about the difference between paramagnetism and ferromagnetism.