(a) Find the individual monthly (30-day) electric energy costs (to the nearest dollar) for each of the following household appliances if the utility rate is $0.12/kWh: central air conditioning that runs 30% of the time; a blender that is used 0.50 h/month; a dishwasher that is used 8.0 h/month; a microwave oven that is used 15 min/day; the motor of a frost-free refrigerator that runs 15% of the time; a stove (burners plus oven) that is used a total of 10 h/month; and a color television that is operated .
(b) Determine the percentage that each appliance contributes to the total monthly electric cost.
(c) What is the resistance of each appliance and current in each appliance when they are operating?