In a particular city, electrical energy costs $0.13 per kilowatt-hour. (Round your answers, in dollars, to at least two decimal places.) (a) How much does it cost to operate an old-style incandescent 40.0-W light bulb continuously for 24 hours? How is power related to energy? Be sure to find an energy in units of kilowatt-hours. Then, use it along with the cost rate in dollars per kilowatt-hour to find a cost in dollars. (b) A modern LED light bulb that emits as much visible light as a 40.0-W incandescent only draws 4.50 W of power. How much does it cost to operate this bulb for 24 hours? (c) A particular electric oven requires a potential difference of 220 V and draws 20.0 A of current when operating. How much does it cost to operate the oven for 4.80 hours?

In a particular city, electrical energy costs $0.13 per kilowatt-hour. (Round your answers, in dollars, to at least two decimal places.) (a) How much does it cost to operate an old-style incandescent 40.0-W light bulb continuously for 24 hours? How is power related to energy? Be sure to find an energy in units of kilowatt-hours. Then, use it along with the cost rate in dollars per kilowatt-hour to find a cost in dollars. (b) A modern LED light bulb that emits as much visible light as a 40.0-W incandescent only draws 4.50 W of power. How much does it cost to operate this bulb for 24 hours? (c) A particular electric oven requires a potential difference of 220 V and draws 20.0 A of current when operating. How much does it cost to operate the oven for 4.80 hours?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter6: Energy Of A System

Section: Chapter Questions

Problem 57P

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