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Questions and Answers
What is the conversion of 1 kilowatthour to Btu?
What is the conversion of 1 kilowatthour to Btu?
How many joules are there in 1 watthour?
How many joules are there in 1 watthour?
What is the equivalent of 1 gigawatt in kilowatts?
What is the equivalent of 1 gigawatt in kilowatts?
Which conversion represents 1 horsepower in Btu per hour?
Which conversion represents 1 horsepower in Btu per hour?
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What is the relationship between calories and Btu?
What is the relationship between calories and Btu?
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How many kilocalories are in 1 kilowatthour?
How many kilocalories are in 1 kilowatthour?
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What is 1 Btu equivalent to in joules?
What is 1 Btu equivalent to in joules?
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What does 1 dekatherm equal in Btu?
What does 1 dekatherm equal in Btu?
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How many megajoules are in 1 kilowatthour?
How many megajoules are in 1 kilowatthour?
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What is the equivalent of 1 megawatt in kilowatts?
What is the equivalent of 1 megawatt in kilowatts?
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What is the approximate equivalent of 1 kilojoule in kilocalories?
What is the approximate equivalent of 1 kilojoule in kilocalories?
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Convert 1 Btu to joules.
Convert 1 Btu to joules.
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Which of the following correctly defines a watt?
Which of the following correctly defines a watt?
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What is 1 kilowatthour equivalent to in megajoules?
What is 1 kilowatthour equivalent to in megajoules?
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How many joules are equivalent to 1 terajoule?
How many joules are equivalent to 1 terajoule?
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What is the relationship between kilocalories and kilojoules?
What is the relationship between kilocalories and kilojoules?
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What does 1 megawatt equal in watts?
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?
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?
What is the approximate conversion for 1 kilowatt in horsepower?
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How many gallons are in 1 barrel of crude oil?
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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