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2. Using ratios to solve problems: A 1.0 farad capacitor stores about 5 joules of electrical potential energy. How many such charged capacitors would it take to equal the 0.7 million joules of chemical energy stored in a bottle of gasoline the size of one of these capacitors? 3. Using units to solve problems: A rechargeable 1.25 volt AA battery is rated at 0.6 amp-hours. a) How many coulombs of charge are equal to 0.6 amp-hours? (Hint: 1 hour = 3,600 sec) b) If this much charge is supplied by the battery at a voltage of 1.25 volts, how much energy is available from this battery? The Ohio State University, 2015 85 8/15/15