Colombs,Amps,Volts,and Watts. HELP

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SUMMARY

The discussion centers on the interpretation of a car battery's rating of 250 amp-hours, which indicates the total charge the battery can deliver, not energy or power. The calculation of coulombs produced by the battery is correct, yielding 900,000 coulombs for one hour. However, the confusion arises from equating the total number of electrons with energy, which is incorrect. The correct understanding is that amp-hours measure charge, while voltage and energy require additional calculations.

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Colombs,Amps,Volts,and Watts. HELP!

Homework Statement



A given car battery is rated at 250 amp-hours. Does this rating indicate the amount of energy, power, charge, voltage, or current that can be drawn from the battery? Explain.

Homework Equations



Coulombs, Amps, Volts, Watts.

The Attempt at a Solution



I first calculated the coulombs that this battery produces in one hour. That turned out to be 250amp-hours X 3600seconds= 900,000.

Is this the furthest that I can get?? I am really stumped because I thought I could get more than just the number of coulombs. I tried finding out how many electrons pass through (2.25x10^22) but it seems like I cannot learn joules or voltage by knowing how many total electrons a battery is capable of dispensing.

I guess my problem is that I am equating the total number of electrons as a sort of total amount of energy. This is wrong?:cry:
 
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Your calculation has the right dimensions and is correct. But the 3600 is not seconds, it's just a number to convert the hours to seconds.

Amp-hours is charge because amp=Coulomb/s.
 

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