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?
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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?
Simple conversion of units. We don't do homework here. We help.
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