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→Energy Usage of Appliances
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:200px; text-align:centerleft;" |: Energy = Power x time: Power = 60W = 0.060kW: Time = 8 hours: Energy = 0.060 x 8: Energy = 0.48kilowatt-hours
| style="height:20px; width:200px; text-align:centerleft;" |: Energy = Power x time: Power = 25W = 0.025kW: Time = 8 hours: Energy = 0.025 x 8: Energy = 0.20kilowatt-hours
| style="height:20px; width:200px; text-align:centerleft;" |: Energy = Power x time: Power = 2000W = 2.0kW: Time = 30 minutes = 0.5hours: Energy = 2.0 x 0.5: Energy = 1.0kilowatt-hours
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| style="height:20px; width:200px; text-align:center;" |Television
A 2500[[Watt]] television is left on for 45 minutes each day.
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| style="height:20px; width:200px; text-align:centerleft;" |: Energy = Power x time: Power = 250W = 0.25kW: Time = 3 hours: Energy = 0.25 x 3: Energy = 0.75kilowatt-hours
| style="height:20px; width:200px; text-align:centerleft;" |: Energy = Power x time: Power = 200W = 0.20kW: Time = 24 hours: Energy = 0.20 x 24: Energy = 4.8kilowatt-hours
| style="height:20px; width:200px; text-align:centerleft;" |: Energy = Power x time: Power = 2500W = 2.5kW: Time = 45 minutes = 0.75 hours: Energy = 2.5 x 0.75: Energy = 1.875kilowatt-hours
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