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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 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 watt being used for one hour. … The kilowatt hour(symbol kW·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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That's like asking "How many miles per hour are in one mile ?" Kilowatts is a unit of power ... the rate of using energy. Kilowatt-hours is a unit of energy. You can't con…vert between units of power and units of energy. If you divide 1 kWh / 1 kW, you get an hour, which is a unit of time. ====== 1 KWh = 3,600,000 Watts-seconds = 3600 KW-seconds = 3.6 MW-seconds. Note: KWs=KiloWatts. Rationale: Joule = the SI unit of work or energy, equal to the work done by a force of one newton when its point of application moves through a distance of one meter in the direction of the force: equivalent to ... one watt*second. Watt = the derived SI unit of power, equivalent to one joule per second and equal to the power in a circuit in which a current of one ampere flows across a potential difference of one volt. KiloWatt = a unit of power equal to 1000 Joules per second. Power = In physics, power is the rate at which energy is transferred, used, or transformed. The unit of power is the joule per second (J/s). In electricity the basic unit of power is the Watt. Therefore: 1 Joule per second = 1 Watt 1 kiloWatt = 1000 Watts 1 kiloWatt hour = 1000 Watt-hours = 1000 Watts for 3600 seconds = 1000 Watts * 3600 seconds = 3,600,000 Watt-seconds = 3600 kiloWatt-seconds Electrical Power is simply expressed Watts or multiples of Watts (Watt-hours, KWhs, MWhrs, etc). Electrical energy is expressed in Watts*time. Below are some examples: 1 Watt for one second = 1 Watt-second or 1 Watt*second, etc 1 kiloWatt for one second = 1000 Watt-seconds, etc 1 Watt*hour = 1 Watt for 1 hour = 1 Watt * 3600 seconds = 3600 Watt*seconds. 1 kiloWatt*hour = 1000 Watt*hours 1 megaWatt*hour = 1 million watt*hours (MORE)

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There are 3413 btu per kWh and 100,000 btu per therm of natural gas, these are constants. In order to give a correct answer the exact efficiency rating of the high efficiency …furnace and the energy costs per kWh and therms would need to be known. (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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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)