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Wher about as 12. * Nine no of balls f: the many the ratio o and for th equal disti Types of energy and reversibility of a process Describe the types rgy that change, the work done on the system, and the energy trans- through heating during the following processes. Indicate whether a erse process can occur. (a) Water at the top of Niagara Falls cascades onto the blades of an electric generator near the bottom of the falls, rotating the blades and generating an electric current that causes a lightbulb to glow. The water, generator, lightbulb, and Earth are the system. (b) Each second, your body converts 100 J of metabolic energy (converting complex mole- cules from food) to thermal energy transferred to the air surrounding your body. The system is your body and the surrounding air. (c) The hot gas in a cylinder pushes a piston, which causes the blades of an electric generator to turn, which in turn causes a lightbulb to glow briefly. The system is the original hot gas (which cools while pushing the piston), the generator, and ugntbulb (which first glows and then stops glowing and cools down). Ollowing processes, choose the initial and final states and where n is 13. * Rolling d guished by termine the are three m the macrost 2. For the following proces describe the non