Chapter 18, Problem 34P

To determine

The cost of the energy.

Answer to Problem 34P

The answer is $\$21$ .

Explanation of Solution

Given:

Power, $P=25W$ and charges = $\$0.095/kWh$

Formula used:

To calculate cost of energy, multiply the kilowatts of power consumed, number of hours in operation and cost per $kWh$ together.

Calculation:

Calculate the cost of energy,

Cost $=\left(25W\right)\left(\frac{1kW}{1000W}\right)\left(365days\right)\left(\frac{24hours}{1day}\right)\left(\frac{\$0.095}{kWh}\right)\approx \$21$

Conclusion: The cost is $\$21$ .