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→Energy Usage of Appliances
|+ The Power ratings of some electrical appliances.
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| style="height:20px; width:200px250px; text-align:center;" |'''Filament Bulb'''
A 60[[Watt]] filament bulb may be used for 8 hours a day. Calculate the [[energy]] in kilowatt-hours.
| style="height:20px; width:200px250px; text-align:center;" |'''Energy Saving Bulb'''
A 25[[Watt]] energy saving bulb may be used for 8 hours a day. Calculate the [[energy]] in kilowatt-hours.
| style="height:20px; width:200px250px; text-align:center;" |'''Kettle'''
A 2000[[Watt]] kettle may be used for 30 minutes a day. Calculate the [[energy]] in kilowatt-hours.
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| style="height:20px; width:200px250px; text-align:left;" |
: Power = 60W = 0.060kW
: Time = 8 hours
: Energy = 0.48kilowatt-hours
| style="height:20px; width:200px250px; text-align:left;" |
: Power = 25W = 0.025kW
: Time = 8 hours
: Energy = 0.20kilowatt-hours
| style="height:20px; width:200px250px; text-align:left;" |
: Power = 2000W = 2.0kW
: Time = 30 minutes = 0.5hours
: Energy = 1.0kilowatt-hours
|-
| style="height:20px; width:200px250px; text-align:center;" |'''Television'''
A 250[[Watt]] television is left on for 3 hours each day. Calculate the [[energy]] in kilowatt-hours.
| style="height:20px; width:200px250px; text-align:center;" |'''Refrigerator'''
A 200[[Watt]] refrigerator is on for 24 hours each day. Calculate the [[energy]] in kilowatt-hours.
| style="height:20px; width:200px250px; text-align:center;" |'''Oven'''
A 2500[[Watt]] oven is used for 45 minutes each day. Calculate the [[energy]] in kilowatt-hours.
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| style="height:20px; width:200px250px; text-align:left;" |
: Power = 250W = 0.25kW
: Time = 3 hours
: Energy = 0.75kilowatt-hours
| style="height:20px; width:200px250px; text-align:left;" |
: Power = 200W = 0.20kW
: Time = 24 hours
: Energy = 4.8kilowatt-hours
| style="height:20px; width:200px250px; text-align:left;" |
: Power = 2500W = 2.5kW
: Time = 45 minutes = 0.75 hours