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Questions and Answers
What is the conversion of 1 kilowatthour to Btu?
How many joules are there in 1 watthour?
What is the equivalent of 1 gigawatt in kilowatts?
Which conversion represents 1 horsepower in Btu per hour?
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What is the relationship between calories and Btu?
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How many kilocalories are in 1 kilowatthour?
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What is 1 Btu equivalent to in joules?
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What does 1 dekatherm equal in Btu?
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How many megajoules are in 1 kilowatthour?
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What is the equivalent of 1 megawatt in kilowatts?
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What is the approximate equivalent of 1 kilojoule in kilocalories?
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Convert 1 Btu to joules.
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Which of the following correctly defines a watt?
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What is 1 kilowatthour equivalent to in megajoules?
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How many joules are equivalent to 1 terajoule?
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What is the relationship between kilocalories and kilojoules?
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What does 1 megawatt equal in watts?
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To raise the temperature of one pound of water by one degree Fahrenheit, what amount of heat in Btu is required?
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What is the approximate conversion for 1 kilowatt in horsepower?
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How many gallons are in 1 barrel of crude oil?
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Study Notes
Common Prefixes and Abbreviations
- Deka = ten, Hecto = hundred, Kilo = thousand, Mega = million, Giga = billion, Tera = trillion.
Joule Measurements and Conversions
- Energy needed to lift one newton (about 102 g) one meter = 1 joule.
- 1 joule = 0.0009478 Btu, and conversely, 1 Btu = 1,055.05585 joules.
- 1 kilojoule (kJ) = 1,000 joules, which equals 0.947817 Btu.
- 1 kilocalorie (kcal) = 4.1868 kilojoules, or 1 Btu = 1.055 kilojoules.
- 1 kilowatt-hour (kWh) = 3.6 megajoules, while 1 megajoule = 1 million joules.
British Thermal Unit (Btu) Measurements and Conversions
- A Btu raises one pound of water’s temperature by one degree Fahrenheit.
- 1 Btu = 252 International Table calories, or 0.252 kilocalories.
- 1 therm = 100,000 Btu, and 1 dekatherm = 10 therms or 1 million Btu.
Electricity Measurements and Conversions
- 1 watt = 1 joule per second; 1 kilowatt = 1,000 watts.
- Human climbing stairs generates about 200 watts of energy.
- 1 kilowatthour = 3,412 Btu; 1 kilowatt = 3,412 Btu per hour.
Watthours and Related Measurements
- 1 watthour = amount of energy used by 1 watt for one hour.
- 1 kilowatt-hour = 3,600 joules or 3.6 kilojoules.
- 1 megawatt (MW) = 1 million watts, while 1 terawatt (TW) = 1 trillion watts.
Power Measurements and Conversions
- 1 Btu per second = 1.055 kilowatts, equivalent to 1.415 horsepower (electric).
- 1 horsepower (electric) = 0.7457 kilowatts; 1 watt = 0.2388 kilocalories per second.
- 1 kilowatthour (kWh) = 1,000 watthours; 1 gigawatthour (GWh) = 1 billion watthours.
Additional Conversions
- 1 kiloliter = 6.2898 barrels; 1 barrel = 42 gallons.
- 1 metric ton = 2,204.62 pounds; 1 kiloliter = 1 cubic meter.
- 1 kilocalorie = 3.968 Btu; 1 Btu = 1.055 kilojoules.
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