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Name _________________________________________ Date ___________________ Period _________. C OMMON U NITS OF E NERGY AND C ONVERSIONS. calorie (lowercase “c”) – The amount of energy needed to raise the temperature of one gram of water by one degree Celsius.

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Name _________________________________________ Date ___________________ Period _________

COMMON UNITS OF ENERGY AND CONVERSIONS

calorie (lowercase “c”) – The amount of energy needed to raise the temperature of one gram of water by one degree Celsius.

Calorie (uppercase “c) – One-thousand calories; the amount of energy needed to raise one kilogram of water by one degree Celsius.

Joule – The amount of energy done by applying a force of one newton over a distance of one meter. One calorie = 4.182 joules.

BTU – British Thermal Unit; the amount of energy needed to raise the temperature of one pint of water by one degree Fahrenheit.

MBTU, MMBTU – One Million BTUs; the amount of energy needed to raise 1,000 pints (125 gallons, 473 liters) of water by one degree Fahrenheit. 1,000 cubic feet of natural gas = 1 MBTU.

Watt-second – The work required to produce one watt of power for one second, so one J = 1 W·s.

3412 BTU = 1 kWh

1 BTU = 1,055.06 joules

Watt- hour – One watt of power expended over the duration of one hours. 1 W-h is equal to 3,600 J.

Kilowatt-hour – One thousand watts of power expended over the duration of one hour. 1 kWh is equal to 3,600,000 J.

Therm – 100,000 BTU. Burning one therm of natural gas releases 105,500,000 J (or 25,200,000 calories (lowercase “c”) of energy. One therm is equal to 29.3 kWh.

www.eia.gov – the current prices of natural gas and electricity.

www.eia.gov/kids -- Scroll down for energy conversion calculators!


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