attract or repel that when some materials are rub, they can some other objects.
Quite that attracted materials seemed to people notice that century objects with have unusual the 18th ways experimenters iron in them. During of the electricity were familiar with most behave. and magnetism
But the two seen as MICHAEL FARADAY One of the most important figures in the of an understanding separate. Each one was thought to Michael of be carried by a "fluid" 18-19) was
that passed between materials, causing the explored attractions and repulsions people had relationship betw the electricity and magnetism observed.
In the first half of the 19th century an by careful and inspired experiment at the Rova amazing discovery was made: electricity can make Institution in London, t The and magnetism can make electricity. discoveries of electromagnetism were very important to an understanding of energy.
If these two "natural for could change from one to the other, maybe of nature could do so, too. The stage was set for the development of the Law of Conservation of Energy (pp. 24-25)