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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 Science

1 kW is equal to 3412.3 BTU/hour. This is using the values of 1.055 kJ per BTU and 3600 kJ/kWh. Other sources confusingly list the exact conversion of 1 kWh as 3412.14163 BTU …3412.1416416 BTU 3412.1414799 BTU (One source uses both 3412 and 3413 in linked pages.) (MORE)

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In Science

5 kilowatt of electricity used in 2 hours is 5 x 2 = 10 kilowatt-hours Scroll down to related links below. Additional Answer A kilowatt hour (kW.h) is a unit of measu…rement for energy, and is used by electricity companies for the purpose of billing consumers for the energy they purchase. In science and engineering, it is more usual to measure energy in joules (J). A kilowatt hour represents the energy used at the rate of one kilowatt over a period of one hour, where the kilowatt is a unit for power (rate of energy consumption or expenditure). (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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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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In order to determine power from volts and amps, we need to know the power factor and efficiency, but the question did not provide that information, so I will make an educated… guess that the efficiency is 0.95 and the power factor is 0.92. The actual motor nameplate ratings will have to factor into the real calculations. 460 V times 120 A is 55.2 KVA. The question did not say, but it is assumed that the 120 A is per phase, so divide by 1.732 (square root of 3) to get winding power of 31.9 KVA, and then multiply by 3 to get total winding power of 95.6 KVA. Multiply by 0.92 and 0.95 to get power in watts of 83.6 KW. If you want to know kilowatt-hours for 30 days, multiply by 30 and 24 to get 60.2 mega watt-hours. (MORE)

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In Science

Your question reminds me of the most important lesson my intro to engineering professor taught us. The answer to every question is, "well that depends." This one seriously dep…ends. Your location, house size, appliance configuration, and living habits will all have dramatic affects on your electical usage. I think my bills up in Alaska ranged from an average of 5-10 kW average to 35+ in the winter. (MORE)

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In Science

A Kilowatt hour is 1000 watts per hour. A 50 watt bulb will use just 50 watts per hour. Therefore over 12 hours the 50 watt bulb will use 50*12 watts = 600 watts… or 0.6 of a kilowatt hour. (MORE)

As it turns out, these stars actually regret the roles responsible for launching their careers into unforgettable stardom. After you read our explanations, perhaps you'll unde…rstand why. (MORE)

Chris Norton

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When it comes to basic facts, what you don't know can hurt you, or at the very least surprise you.… (MORE)