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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 ? See Figure 20.44.

Total cost per year $=\$ 438$

Physics 102 Electricity and Magnetism

Chapter 20

Electric Current, Resistance, and Ohm's Law

Current, Resistance, and Electromotive Force

Adnaan H.

December 13, 2020

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 ?

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 10.0 cents/kW ? h ?

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So for this problem, we know that Ah, we have a power p equal, Uh, five kilowatts and every day it is running for two hours. So t is two hours, and in one here, there's, ah, 365 days. So one your equal 3 65 days and, uh, for each kid awards times our the courses, the cost is point 0.12 cents per kill was our So we want to find out if way around this Ah ah heater for whole year home it how much we need the coast. So it's simply five kita waltz times two hour and times 3 65 So this is the total energy that we use in the whole year and the times 0.12 Ah, sense taquito wallets. Our So this gives us a lot of money that we need to use, uh, in the whole year. So the value is, uh ah, full 38. So in the whole year, we need to pay for $38. Okay,

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