The cost of electricity varies widely throughout the UnitedStates; $0.120/kWh is a typical value. At this unit price, calculatethe cost of (a) leaving a 40.0 - W porch light on for 2 weekswhile you are on vacation, (b) making a piece of dark toast in3.00 min with a 970 - W toaster, and (c) drying a load of clothesin 40.0 min in a 5 200 - W dryer.

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
Chapter21: Current And Direct Current Circuits
Section: Chapter Questions
Problem 26P
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The cost of electricity varies widely throughout the United
States; $0.120/kWh is a typical value. At this unit price, calculate
the cost of (a) leaving a 40.0 - W porch light on for 2 weeks
while you are on vacation, (b) making a piece of dark toast in
3.00 min with a 970 - W toaster, and (c) drying a load of clothes
in 40.0 min in a 5 200 - W dryer.

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