Aboy throws a pebble into the center of the pond. a floating leaf near the waters edge oscillates ( moves up and down ) two complete cycles in one second as water waves move past the leaf. the waters wavelength is 10 meters. what is the waves velocity?

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.