How To Use Watt-hour In A Sentence
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That means that a AA battery can produce 2.8 amps for an hour at 1.5 volts (about 4.2 watt-hours - a AA battery can light a 4-watt bulb for a little more than an hour).
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Conversions from/to Joule kilowatt-hour electronvolt calorie Btu horsepower hour foot-pound dyne - centimeter therm
Joule
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One watt-hour is the amount of electrical energy equivalent to a one-watt load drawing power for one hour.
Watt-hour
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Conversions from/to Joule kilowatt-hour electronvolt calorie Btu horsepower hour foot-pound dyne - centimeter therm
Joule
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1 B.T. U. (British T.ermal Unit) = 1,052 watt-seconds = 778 foot-pounds = 0.252 calorie = 0.000292 kilowatt-hours = 0.000391 horsepower-hour
Practical Mechanics for Boys
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Since early September, however, the amount of electricity from Opportunity's solar panels has increased markedly - and unexpectedly - to more than 700 watt-hours per day at times, a level not seen since the first 10 weeks of the mission.
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The following conversions are based on the IT calorie. from/to Joule kilowatt-hour electronvolt calorie Btu horsepower hour foot-pound dyne - centimeter therm
Calorie
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The watt-hour (symbol W·h) is a unit of energy commonly used to measure electricity.
Watt-hour
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In the past 10 years alone, the energy density of lithium-ion batteries has doubled, and the price per watt-hour has fallen by more than 80%.
Matthew Yglesias » Anti-Volt Isn’t Anti-Car
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It is expected that for every square meter of surface, the process could generate about 1 watt-hour per year.
ALTERNATIVE ENERGY: Rain Power | Inhabitat
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The ‘eyes’ were LED read-outs in either kilowatt-hours or the amount of actual money you are currently throwing out the window.
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For comparison, azobenzene alone has a volumetric energy density of only about 90 watt-hours per litter.
Wired Top Stories
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That caused the rover's average solar energy to spike up 720 watt-hours, not much below the power level she had shortly after landing nearly two Earth years ago.
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The paper compares the three kinds of methods and, according to the characteristics of watt-hour meter in use stratified sampling, considers Neyman allocation as the appropriate method.
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The country's National Development and Reform Commission is hoping the purchase of new air conditioners will save 75 terawatt-hours of power demand annually in coming years.
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Britain uses about a terawatt-hour of electricity during an average winter day.
Times, Sunday Times
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We'll skip over the explanation that energy output ought to be expressed as watt-hours or BTUs per hour, but never is.
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The energy required is now believed to top 30 terawatt-hours of power globally - enough to power around three million homes.
The Sun
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But the Bentek study shows that in California, a state that relies heavily on natural gas-fired generation, the carbon dioxide reduction from wind energy was just 0.3 tons of carbon dioxide per megawatt-hour.
A New Study Takes The Wind Out Of Wind Energy
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With the cost of the Kyoto Protocol looming large on the horizon, every watt-hour we save represents fewer carbon-credits we need to purchase.
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In the inch-pounds unit system, a watt-hour is equivalent to 3.412 Btu.
Watt-hour
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A BTU, or British thermal unit, is a unit of energy equivalent to about one-third watt-hour of electric power.
Corrections & Amplifications
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This glazing is projected to save 9.5 million kilowatt-hours of electricity per year.
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It supports Wi-Fi, Bluetooth and aGPS and includes a built-in 25-watt-hour lithium battery.
Tablet Wars
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For comparison, the iPad 2 has a 25 watt-hour battery; the 11in MacBook Air model has a 35Wh battery, going up to 40Wh in the 13in model.
Apple working on ARM port for Mac OS X: will Macbook Airs see it first?
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The Prius is peppy enough, and the car's video game-like display encourages you to drive with a light foot, rewarding you with a green leaf symbol for every 50 watt-hours of electricity you regenerate during braking and coasting.
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The watt-hour It is not an SI unit, despite being based on the watt.
Watt-hour
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The nation used 14 billion kilowatt-hours of electricity in February, 1.3 percent less than the same month last year, the bureau said.
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He lent me a digital power meter that measures both demand in watts and cumulative energy consumption in watt-hours.
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The power plant generated 5.22 billion kilowatt-hours of electricity, up 4.8 per cent from the previous year.
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Reusing paper saves the energy used to make new paper (an average of 15 watt-hours of energy is used to produce a single sheet of paper), and it saves you the money of purchasing it.
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Approximately two shot glasses of ethanol could yield enough hydrogen to generate 350 watt-hours of electricity, enough to power half a dozen 60-watt lightbulbs for an hour.
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VILNIUS - Vilniaus Energija, the heating supplier to Vilnius, has announced plans to increase heating prices in homes by 51.1 percent to 34.09 Lithuanian centas (9.88 euro cents) per kilowatt-hour (kWh), not including the value-added tax (VAT), starting February.
News from Estonia, Latvia and Lithuania. The Baltic Times.
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Every watt-hour you can save is heat that the customer doesn't have to deal with.
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The energy charge, measured in kilowatt-hours, is for the actual electricity that is used by the facility.
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By using a 240-volt circuit (such as the outlet for an electric dryer), the car might be able to receive 240 volts at 30 amps, or 6.6 kilowatt-hours per hour.
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Microturbines, fuel cells, photovoltaics, solar cells, and even conventional, small-scale generators have been improved in terms of lifecycle cost per kilowatt-hour.
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The estimated cost of producing electric power from anaerobic digestion of animal manure is 3.7 to 5.4 cents per kilowatt-hour.
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The car will carry a 16 kilowatt-hour battery, which is about the amount of power that a suburban house uses in 12 hours.
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A typical lithium-ion battery inside of a laptop generates about 275 to 285 watt-hours per liter of material.
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Just last June, he threw his first bash celebrating his solar electric system's generation of more than 10 million watt-hours of sun-powered energy.
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Among the concepts I have introduced here are kinetic and potential energy; field, limit, and gradient; and such measures as the Calorie, the kilowatt and the kilowatt-hour, the horsepower and horsepower-hour.
Energy and Society~ Chapter 1~ Energy & Society
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Electricity output dipped 2 per cent, to 10.7 terawatt-hours.
Times, Sunday Times
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It takes about 12 kilowatt-hours of electricity to charge the car after a 50-mile trip.