Well, this is part two to my answer on how electromagnetic force causes change. I liked Adam's example of the solar system ( http://crimsonrun.blogspot.com/), but I think that you could take it one step further. In class, Mr. V likened the electromagnetic force to gravity, in such as it was weaker as the two objects travelled farther apart and stronger as they came closer. That could be seen as similar to the relationship between the moon and the Earth. The moon's gravitational force pulls on the Earth, but the Earth has a pretty secure hold on everything except water. The moon pulls the water towards it and the Earth pulls it back. This is how tides are created. Now, if the moon was 2 feet away from the Earth, we would have larger tides than if it was 1,000,000,000,000,000,000,000,000 light years away.
(http://home.hiwaay.net/~krcool/Astro/moon/moontides/)
The same can be said about electromagnetic force. If the two opposites are closer togther, they are more attracted to each other. This is shown in atoms. If an atom is relatively large, and the outer electrons are far away from the nucleus, then the atom will be more inclined to give them up than if they are closer to the nucleus. The idea of opposites attracting can also be seen in people. Often times people will become friends with someone completely different from thenselves because they admire something about that person that they don't have or do. For example, a really shy, smart person is friends with, and admires, a really out-going person who doesn't do well in school. This has affected me because I have some friends who are staunch republicans or who are much more artistically inclined than I am. They are opposite from me in some ways, and yet we get along very well. There it is, my complete, albeit lengthy, answer on how electromagnetic force causes change.
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