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25 Cards in this Set
- Front
- Back
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Fundamental Units
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length, mass, time
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thermal gradient
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sudden flowing of heat from WARMER --> COOLER bodies
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ionization radiation
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enough E to dislodge an electron from atoms forming ions
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High Quality Energy (HQE)
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organized, concentrated, performs useful work, fossil fuels, nuclear
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Low Quality Energy (LQE)
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disorganized, dispersed, heat in ocean, air wind, solar
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First Law of Thermodynamics
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Energy is never created or destroyed only available for conversion
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Law of Conservation of Energy
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Energy is never created or destroyed only available for conversion
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Second Law of Thermodynamics
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when E is converted to another form, some useful energy becaomes LQE; usually wasted heat
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Best solutions to E shortage
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inc efficiency, conservation, alter E options
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Alternate energy options (6)
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biomass, wind, solar, geothermal, waves, fuel cells
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Work
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Force = Mass X acceleration
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Energy
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Force X Distance
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USCS and SI
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United States Customary System; Systeme International
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Joule (J)
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amount of work done by a FORCE of 1 N acting thru distance of 1 m
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Calorie
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amount of HEAT required to raise temp of 1 g H20 by 1 degree C
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kilocalorie
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big calorie; 1 cal = 1,000 kcal
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BTU
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amount of HEAT needed to raise temp of 1lb of H20 by 1 degree F
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1 calorie = _____ Joules
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4.186 J = ___ calorie
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1 Btu = 252 ____
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252 calories = __ Btu = 1055 J
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1 therm = 100,000 _ _ _
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100,000 Btu = 1 ______
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power
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time rate of doing work; J/sec
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1 watt = 1 _/sec
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1 ____ = 1 J/sec
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electrical energy measured in...
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kilowatt-hours (kWh)
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solar flux
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rate that energy is received from sun
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solar constant
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1400 W/m2
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