question archive A kilowatt hour means 1000 watts of electricity are being used continuously for 1 hr
A kilowatt hour means 1000 watts of electricity are being used continuously for 1 hr
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A kilowatt hour means 1000 watts of electricity are being used continuously for 1 hr. The electric utility company in? Laura's town charges ?$0.03119 for each kilowatt hour used. Laura heats her home with four electric heaters that each use 1500 watts per hour. How much does it cost to heat her house for one? day?
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$4.49
We are told that 1 kWh = 1000 W and that 1 kWh costs $0.03119, so 1 W costs:
0.03119 / 1000 = $0.00003119
Also, we are told that 1 electric heater uses 1500 W per hour, so 4 electric heaters use:
4 * 24 * 1500 = 144000 W per day
With that daily amount of watts and that cost per watt, the cost for Laura to heat her house for one day will be:
144000 * 0.00003119 = $4.49
