What is the cost of lighting a 500 watt outdoor light for 8 hours, if electricity cost 7.5 cents per kilowatt-hour
To calculate the cost of lighting a 500 watt outdoor light for 8 hours, we need to determine the total energy consumption in kilowatt-hours (kWh) and then multiply it by the cost of electricity.
First, convert the power consumption from watts to kilowatts:
500 watts = 500/1000 = 0.5 kilowatts
Next, calculate the total energy consumption:
Energy consumption = Power (kW) x Time (hours)
Energy consumption = 0.5 kW x 8 hours = 4 kWh
Finally, calculate the cost:
Cost = Energy consumption (kWh) x Cost per kWh
Cost = 4 kWh x $0.075/kWh = $0.30
Therefore, it would cost $0.30 to light a 500 watt outdoor light for 8 hours at a rate of 7.5 cents per kilowatt-hour.
To calculate the cost of lighting a 500-watt outdoor light for 8 hours, you need to follow these steps:
Step 1: Convert the wattage of the light to kilowatts.
500 watts = 500/1000 = 0.5 kilowatts
Step 2: Calculate the energy consumption in kilowatt-hours.
Energy consumption = Power (kW) × Time (hours)
Energy consumption = 0.5 kW × 8 hours = 4 kilowatt-hours
Step 3: Calculate the total cost of electricity.
Total cost = Energy consumption (kWh) × Electricity cost (cents/kWh)
Total cost = 4 kWh × 7.5 cents/kWh
Now you can calculate the final answer by multiplying these two values:
Total cost = 4 kWh × 7.5 cents/kWh
Total cost = 30 cents
To calculate the cost of lighting a 500 watt outdoor light for 8 hours, we need to follow these steps:
1. Convert the wattage to kilowatts: Divide the wattage by 1000.
500 watts = 500 / 1000 = 0.5 kilowatts.
2. Calculate the total energy consumed in kilowatt-hours (kWh): Multiply the power consumption in kilowatts by the number of hours.
Energy consumed = Power (in kilowatts) × Time (in hours)
Energy consumed = 0.5 kW × 8 hours = 4 kilowatt-hours.
3. Calculate the cost: Multiply the energy consumed in kilowatt-hours by the cost per kilowatt-hour.
Cost = Energy consumed (in kilowatt-hours) × Electricity cost (per kilowatt-hour)
Cost = 4 kWh × $0.075/kWh = $0.30.
Therefore, the cost of lighting a 500 watt outdoor light for 8 hours would be $0.30.