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### 20 Cards in this Set

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 what are the 6 forms of energy? mechanical, nuclear, thermal, chemical, radiation, electrical list the forms of radiation, from lowest frequency (lowest energy) to highest frequency (highest energy) radio, microwave, ir, visible, uv, x-ray, gamma ray define a british thermal unit (BTU) a unity of energy equal to the amount of energy needed to raise the temperature of one pound of water by one degree F. define calorie amount of energy needed to raise the temp of one gram of water by one degree C. define food calorie often used when measuring energy content of food. it is equal to 1000 calories. define joule one joule = .2388 calories = .0009481 BTU define kilocalorie 1000 calories define kilowatt-hour amount of energy from production/consumption of one kilowatt of power per hour. define therm 100,000 BTUs oil, natural gas, and coal are examples of what? non-renewable resources power = ? energy/time energy = ? power * time define watt one watt = production/use of 1 joule/second define kilowatt 1000 watts daily kilowatt hour consumption = energy consumption per day(Wh)/1000Wh Efficiency = useful energy output/total energy input a motor's efficiency can be measured by... mechanical power/electrical power temperature measurements are always made on which scale? KELVINNNNNN dougherty Carnot efficiency = this will more than likely be a numerical problem on test Low temp= 20C+273 = 293 High temp=540C+273 = 813 (1-(293/813)) = .64 = 64% overall efficiency of a powerplant = electrical energy output/chemical energy input