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About 30,000 Joules of energy is stored in a typical 1.5 volt D-cell battery. If two...

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Physics

About 30,000 Joules of energy is stored in a typical 1.5 voltD-cell battery. If two such batteries are joined to produce a totalof 3 volts in a circuit and cause 1.2 amps of current, how longwill the batteries be able to deliver power to the circuit at thislevel? The resistance of an electric heater is 8 ohms whenconnected to 120 volts, how much energy does it use during 40minutes of operation?

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