A concave mirror has a focus of 25 cm. If an object is placed 60 cm away from the mirror, will the image be real or virtual? Will it be upright or upside down? What will its magnification be? Answer these questions using both the equations and a ray diagram.

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.