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The capacity of a storage battery, such as those used in automobile electrical systems, is rated in ampere-hours (A· h). A 50- A h battery can supply a current of 50 A for 1.0 h, or 25 A for 2.0 h, and so on.
(a) What total energy can be supplied by a 12-V, 60-A h battery if its internal resistance is negligible?
(b) What volume (in liters) of gasoline has a total heat of combustion equal to the energy obtained in part (a)? (See Section 17.6; the density of gasoline is 900 kg/m3.)
(c) If a generator with an average electrical power output of 0.45 kW is connected to the battery, how much time will be required for it to charge the battery fully? |
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