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 Afor 1.0 h, or 25 A for 2.0 h, and so on. A) What total energy can be supplied by a 13V, 60A? h battery if its internal resistance is negligible? Answer = ... JB) 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 90 kg/m 3.) Answer = ... LC) 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? Answer = ... h

Question

Caprice

Physics

1 February, 09:16

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 Afor 1.0 h, or 25 A for 2.0 h, and so on. A) What total energy can be supplied by a 13V, 60A? h battery if its internal resistance is negligible? Answer = ... JB) 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 90 kg/m 3.) Answer = ... LC) 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? Answer = ... h

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Answers (1)

Know the Answer?

Robert Maddox · Answer 1

Answer: (A) 780J

(B) 1.89*10^-11L

(C) 1.67*10^-4 h

Explanation:

Energy of the battery = IVt

=13*60 = 780J

Heat combustion of

1g of gasoline relax 46000J

Therefore 780J will release 780/46000

= 0.017g

Density = mass/volume

Volume = mass/density

Volume = 0.017 * 10^-3 / 900

= 1.89 * 10^-8 m3

= 1.89*10^-11 litres

P=IVt

t=P/IV

= 450/60*13

1.67*10^-4 hours