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    mr_ray2008's Avatar
    mr_ray2008 Posts: 3, Reputation: 1
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    #1

    Mar 8, 2008, 09:15 PM
    Resistors and Electricity
    A 9.0-V battery costs $1.49, and will run a portable CD player for 6 hours. Suppose the battery supplies a current of 25 mA to the player. What is the cost of energy in dollars per kWh?
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #2

    Mar 8, 2008, 09:27 PM
    Simple conversion of units. We don't do homework here. We help.
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