Answered: A 9 V battery costs $1.49, and will run…

A 9 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 the energy in dollars per kWh?

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter20: Electric Current, Resistance, And Ohm's Law

Section: Chapter Questions

Problem 60PE: Integrated Concepts (a) What energy is dissipated by a lightning bolt having a 20,000-A current, a...

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Question

A 9 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 the energy in dollars per kWh?

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