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Published byPhebe Clarissa Baker Modified over 9 years ago
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Capacity to do work by performing mechanical, physical, chemical, or electrical tasks or to cause a heat transfer between two objects at different temperatures
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Popular reference to energy usage is actually... -Transformation of energy from one form to another form that is more useful to us. Potential energy sources include: Nonrenewable fossil and nuclear fuels Renewable forms of solar energy
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Sources are converted to heat, which is used... Directly
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To produce mechanical energy
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To produce electricity
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Net Energy is the one that counts Difference between the amount of energy in the source and the amount of energy expended to get that energy source ready to use.
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How do we decide which energy sources to use?List page 353 U. S. influence on world energy policy 4.6% of world population Use 24% of world’s energy Figure 15 - 16
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Oil located...
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U.S. Oil Numbers 3% of world’s oil reserves Use 26% of oil extracted world wide (68% for transportation) Imported 55% of oil used in the country in 2001 2001 oil bill = $100 billion U.S. oil supply 80% depleted in 10 - 48 years
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More oil numbers Production of reserves peak between 2010 and 2030 Identified reserves will last 53 years at present usage Known and projected supplies expected to be 80% used in 42 - 93 years
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Methane 50 - 90% (mostly) Ethane, propane and butane Hydrogen sulfide What is it?
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Solid fossil fuel formed from buried remains of land plants subjected to intense heat and pressure over millions of years
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Coal Gasificationpg. 364 - 365
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Controlled fission chain reaction using uranium-235 or plutonium-239.
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Radioactivity Alpha – helium nucleus Beta – electrons Gamma – high energy
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Protein Synthesis DNA = TAA/CGC/GTA/TTT/CCG/CAA/GAG mRNA = Amino Acid Sequence = AUU/GCG/CAU/AAA/GGC/GUU/CUC Phe-Ala-His-Lys-Gly-Val-Leu
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Three Mile Island, Pennsylvania
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Chernobyl Reactor After Accident
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Radiation Plume From Chernobyl Nuclear Accident - 26 Apr 86
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What is Nuclear Waste? Low level Gives off small amounts of radiation 100 – 500 years to decay High level Spent fuel rods Any material that has come into contact with the core of the reactor – coolant, tools, old reactor parts, etc. 10,000 - ? to decay
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What do we do with it?Low level waste
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High Level Waste
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