Think of examples of at least one thing that demonstrates energy and trace it back to the sun.

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

How much energy is supplied to each coulomb of charge that flows through a 12-v battery?

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.