A 60 kg pupil runs for 600m in 1 minute uniformly (a)calculate his velocity (b)calculate his kinetic energy
(c)if eating one banana enables a pupil to perform about 3kg of work how many bananas should he eat?​

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.