Answer :
the coffee maker emits about 8.96 pounds of CO2 per week. When rounded to one decimal place, the answer is 9.0 pounds of CO2.
Given that an 800 Watt coffee maker is used for 7 hours in a week. We are to determine how many pounds of CO2 are emitted in one week. We can use the formula;
Energy = Power × time
Where Energy is measured in kWh,
Power is measured in kW and time is measured in hours.
We can convert 800 Watt to kW by dividing by 1000.
Watts = 800W = 800/1000 = 0.8kW
We can also convert the hours to weeks by dividing by 7.
hours = 7 hours/week
Therefore, the Energy consumed in a week is given as;
Energy = Power × time
= 0.8kW × 7 hours/week
= 5.6kWh/week
We can use the conversion factor 1kWh = 1.6 pounds of CO2 to convert from kWh to pounds of CO2.
Energy in pounds of CO2= Energy in kWh × conversion factor
= 5.6kWh/week × 1.6 pounds of CO2/kWh= 8.96 pounds of CO2/week
Therefore, the coffee maker emits about 8.96 pounds of CO2 per week. When rounded to one decimal place, the answer is 9.0 pounds of CO2.
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