9.23.05 - Energy and Life • Heterotrophs –...

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Unformatted text preview: September 23, 2005 Energy and Life • Heterotrophs – consumers (carbon source-organic molecules, energy source is ) • Autotrophs – producers, aka plants, use Co2 and H20 to create organic molecules o Sunlight (photoautotroph) o Chemical (chemoautotroph) Types of Energy • Chemical energy • Potential energy • Kinetic energy • Heat/thermal enrgy • Light energy • Electrical energy • Work Laws of Thermodynamics • 1-Conservation of Energy – Energy cannot be created nor destroyed. It can be converted. o Common Unit for measuring energy: JOULE Joule: exert 1N force x 1meter Electrical: move 1 coulumb of charge through 1 volt. 1V = 1J Power: 1 watt of power for 1 sec = 1J Heat: calories (amount of heat required to raise the temperature of 1g h20 by 1 degree celcius. o 1 N is amount of energy it takes to raise the apple one meter o 100 gram apple, 90% water, 10% glucose, 1 mol glucose=180 g glucose o 1 mole glucose + O2 CO2 + H20 38, 111 CALORIES...
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This note was uploaded on 02/11/2008 for the course BIO G 101 taught by Professor Gilbert,c. during the Fall '07 term at Cornell.

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9.23.05 - Energy and Life • Heterotrophs –...

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