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)

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter15: Thermodynamics

Section: Chapter Questions

Problem 14PE: Calculate the net work output of a heat engine following path ABCDA in the figure below.

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Question

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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