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A kilowatt hour is equal to the amount of electrical energy consumed at a rate of one kilowatt. 1 kilowatt hour is the same as 1000 watt-hours. So using that pri…nciple. A 500 watt microwave will consume 500 watt-hours in an hour, or 0.5 kilowatt-hour. Comment In practice, it's difficult to determine an answer to your question, because microwaves don't operate continuously but, rather, in short bursts. Without knowing the cycle rate of each burst of energy, it's impossible to come up with a definitive answer. (MORE)

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In Fireplaces

1.5 kW "Kilo" means 1000, so a 1500 W appliance uses energy at the rate of 1500 W / 1000 = 1.5kW. By the way, you probably do not mean "kilowatts per hour." A watt (or a k…ilowatt) measures the rate of energy use. Rate units already have the time parameter built in: for example, "kilometers per hour" is a measure of one's rate of travel. What you may mean is "kilowatt-hours," which is what the unit the electric company uses to figure your bill. If you are in the UK, which averages about 7p/kWh for electricity, the fireplace will cost you about 10.5p each hour you run it. In the USA the average cost for electricity is about $0.12/kWh, so the fireplace will cost you about $0.18 every hour. (MORE)

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In Algebra

First let us convert the power of the bulb into kilowatts. A kilowatt is 1000 watts. We have one tenth of that. So 100W = 0.1kW To work out the kilowatt hours we simply mu…ltiply the power in kilowatts by the time the bulb is on for (in hours): 0.1kW x 10h = 1 kWh a 100 watt bulb uses 100 watts of power. In ten hours it uses 100x10 watt-hours, or 1 kilowatt-hour. A kilowatt-hour is also called a unit, and units are what you pay for. (MORE)

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Answer A watt-hour is a measure of watts * time. One watt-hour is the amount of energy used by something drawing one wattÂ being used for one hour. … The kilowatt hour(symbol kWÂ·h, kW h or kWh) is a unit of energy. Energy delivered by electric utilities is usually expressed and charged for in kWh.Note that the kWh is the product of power in kilowatts multiplied by time in hours; it is not kW/h.Also note that watt is the rate at which energy is flowing.For simplicity it means that a 1000 W device will consume 1 kWh in exactly 1 hour.Also a 100 W bulb will consume 1 kWh in 10 hours.(Watt is like speed and kWh is like distance ) (MORE)

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Check the power rating of the TV, and multiply by how many hours you used it for. Say if it uses 180W and you have it on for 4 hours, you will have used 180W * 4 = 720 watt-ho…urs which equals 0.72 kWh. This won't be exact, the TV will use different amounts of power depending on what is displayed on it, how bright the light it is emitting, how loud the speakers etc, but this should give a pretty good estimate. (MORE)

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In Science

It depends what the power rating of the appliance is. A 500 watt microwave will use half a kilowatt if it's run for an hour on full power. A 750 watt unit will use 3/4 of a un…it in the same time period. (MORE)

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Well, I google the convertion table on calculateme.com and I got 1 kilowatt hour = 860 420.65 calories So when you have 3 kilowatt hours you get 2579535.6835769564 cal…ories (MORE)

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The main factors governing this is dependent on the rating of heating element in watts, the temperature being used and the length of time the hair straightener is on. The aver…age device usually draws 1500 watts. If the element remains on continuously for an hour, it would use 1.5 kilowatts per hour. (MORE)

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You need to understand the difference between power - as in watts - and energy - as in Watt hours. Watts/kiloWatts only tells you what it's doing at the moment, at that …very instant. While Wh/kWh tell you the sum of what it's been doing over a certain time. 1 kW = 1000 w So 90 W / 1000 W = 0.09 kW As soon at the light is turned on, the lamp starts to use energy at the rate of 90 W = 0.09 kW If you leave it on for 12 hours it will have used up 0.09 x 12 = 1.08 kWh (MORE)

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Kilowatts and horse power are both measures of power and they must be multiplied by time to get units of energy. 1 HP is 746 watts, so a 3-HP pump works at 3 x 746… watts, and probably uses about 3 kilowatts of electrical power input. In one hour that is 3 kilowatt-hours, also known as 3 Units. Obviously in 6 hours it would use 18 kWh etc. etc. (MORE)

The automotive fuel pump is a critical component. Failure of this auto part can prevent drivers from reaching their destination. Learn more about its operation and warning sig…ns its malfunction is imminent. (MORE)

Discover how a water pump operates and review early warning signs a problem is developing. Dive deeper into the three common symptoms indicating a careful water pump inspectio…n is necessary. (MORE)