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watt-hour |
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watt-hourThe power utilization for one hour measured in watts. Abbreviated "Wh," it is widely used to rate how long it takes for a battery to discharge. For smaller batteries, a milliwatt-hour (mWh) rating is used. For example, a 500 mWh battery means it will release 500 watts at a specific voltage for one hour before it is discharged. See ampere-hour and watt. watt-hour [′wät ¦au̇r] (electricity) A unit of energy used in electrical measurements, equal to the energy converted or consumed at a rate of 1 watt during a period of 1 hour, or to 3600 joules. Abbreviated Wh. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Many of today's systems will consume only 21 watt-hours of electrical energy to deliver a gallon of fresh water (a 12-volt system consuming 13 amperes can produce about 8 gallons per hour). When Spirit landed, it could generate 900 watt-hours of energy, but its solar-array output has since dropped to less than half that amount. Average number Appliance of watt-hours radio 70 TV 200 hair dryer 750 electric toothbrush 7 light bulb 75 electric blanket 180 SOURCE: Science Projects About Electricity and Magnets by Robert Gordner (Enslow Publishers, Inc. |
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