An electric water heater consumes 5.00 kW for 2.00 h per day. What is the cost of running it for one year if electricity costs 12.0 cents/kW ⋅ h ? PachaZETTIFigure 20.41 On-demand electric hot water heater. Heat is supplied towater only when needed. (credit aviddavid, Flickr)

Given: Power, P = 5 kW time,t = 2 hours Cost = 12 cents / kWh

Answered: Pacha ZETTI Figure 20.41 On-demand…

Pacha ZETTI Figure 20.41 On-demand electric hot water heater. Heat is supplied to water only when needed. (credit aviddavid, Flickr)

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter22: Entropy And The Second Law Of Thermodynamics

Section: Chapter Questions

Problem 11PQ

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An electric water heater consumes 5.00 kW for 2.00 h per day. What is the cost of running it for one year if electricity costs 12.0 cents/kW ⋅ h ?

Pacha
ZETTI
Figure 20.41 On-demand electric hot water heater. Heat is supplied to
water only when needed. (credit aviddavid, Flickr)

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