Question

Refrigerator A uses 500 watts per hour when the motor is operating. The motor needs to run an average of 12 hours per day, every day, to stay at a constant, cold temperature. This model of refrigerator lasts an average of 20 years before it needs to be replaced and costs $1,000. Each kWh of electricity costs $0.12. How many kilowatt hours (kWh) per year does refrigerator A use

Answer 1

Answer:

2190kWh per year

Explanation:

Refrigerator A = 500W/hr = 0.5kWh

Running time per day is 12 hours =

Life cycle = 20 years

Cost = $1,000

kWh of electricity $0.12

kWh of electricity per year will be 0.5kWh multiplied by 12 hours multiplied by 365 days

= 0.5kWh X 12 X 365 = 2190kWh per year.

Answer 2

The number of kilowatt hours (kWh) per year that refrigerator A use is 2,190kWh per year.

500 power in watts per hour =0.5 kWh energy in Kilowatt-hours

Using this formula

Kilowatt hours (kWh) per year=Refrigerator A Energy in Kilowatt-hours× Average number of hour per day× Number of days in a year

Let plug in the formula

Kilowatt hours (kWh) per year= 0.5kWh × 12 ×365

Kilowatt hours (kWh) per year= 2,190kWh per year

Inconclusion the number of kilowatt hours (kWh) per year that refrigerator A use is 2,190kWh per year.

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