In the formulas for latent heat of fusion and latent heat of vaporization, what does q represent? the amount of heat released or absorbed by a substance the mass of a substance the amount of a substance that changes state the temperature of a substance

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.