Your oven has a power rating of 5000 watts.
a. How many kilowatts is this?
b. If the oven is used for 2 hours to bake cookies, how many kilowatt-hours (kWh) are used?
c. If your town charges $0.15/kWh, what is the cost to use the oven to bake the cookies?
Answer (3)
a). 1,000 watts = 1 kilowatt 5,000 watts = 5 kilowatts
b). (5 kilowatts) x (2 hours) = 10 kilowatt-hours (kWh)
c). (10 kWh) x (15 cents/kWh) = **$1.50 **
a). The oven's power rating of 5000 watts converts to 5 kilowatts. b). Using the oven for 2 hours consumes 10 kilowatt-hours of energy.c). At a rate of $0.15 per kWh, the cost to use the oven for this duration is $1.50.
An oven has a power rating of 5000 watts. Let's break down the problem step-by-step:
a). Conversion to Kilowatts:
Power in kilowatts (kW) is calculated by dividing the power in watts (W) by 1000:
5000 W / 1000 = 5 kW.
b). Energy Consumption:
Energy consumption in kilowatt-hours (kWh) is calculated by multiplying the power in kilowatts by the time in hours:
5 kW × 2 hours = 10 kWh.
c). Cost Calculation:
Cost is calculated by multiplying the energy consumption by the cost per kWh:
10 kWh × $0.15/kWh = $1.50.
Thus, the cost to use the oven to bake the cookies for 2 hours is $1.50.
The oven has a power rating of 5 kilowatts. Using it for 2 hours consumes 10 kilowatt-hours, costing $1.50 at $0.15 per kilowatt-hour. Therefore, it costs $1.50 to bake cookies for 2 hours.
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