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power_energy_problem2

# power_energy_problem2 - Sample problem Topic Power and...

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Sample problem Topic: Power and energy Problem statement The manufacturer of a 9V dry-cell flashlight battery says that the battery will deliver 20mA for 80 continuous hours. During that time the voltage will drop from 9V to 6V. Assume the drop in voltage is linear with time. How much energy does the battery deliver in this 80-hour interval? Problem solution Now that the voltage drops linearly from 9V to 6V, the power also drops linearly as
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