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Compare the energy consumption of two commonly used items in the household. calculate the energy used by a 1.20 kw toaster oven, wtoaster, which is used for 6.20 minutes and then calculate the amount of energy an 11.0 w compact fluorescent light (cfl), wlight, bulb uses when left on for 8.50 hours.

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skyluke89

Toaster oven:

Power: [tex]P=1.20 kW[/tex]

Time: [tex]t=6.20 min \cdot \frac{1}{60 min/h}=0.103 h[/tex]

So, the energy consumed by the oven is

[tex]E=Pt=(1.20 kW)(0.103 h)=0.124 kWh[/tex]


Fluorescent light:

Power: [tex]P=11.0 W=0.011 kW[/tex]

Time: [tex]t=8.50 h[/tex]

So, the energy consumed by the light is

[tex]E=Pt=(0.011 kW)(8.50 h)=0.094 kWh[/tex]


So, the toaster oven has consumed more energy than the fluorescent light.

Answer: clock radio, toaster, hair dryer, tv, lamp, fridge

Explanation:

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