Why does a ferromagnetic material exhibit magnetic behavior when it is in contact with a magnet? b. if you were to magnetize the same ferromagnetic material so that exhibits magnetic behavior on its own, do you think it would be stronger or weaker than in case (a)? explain why you think so. c. why do you think an electromagnet is stronger than a natural magnet?

Hydroelectricity provides about 7 percent of the electricity generated in the united states. (a) explain how a hydroelectric power plant converts energy stored in water into electricity. (b) identify two factors that determine the amount of electricity that can be generated by an individual hydroelectricity power plant. (c) describe the two main types of land-based hydroelectric power plants. (d) describe two economic advantages and two environmental disadvantages of hydroelectricity.