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Transcript
Energy & Crystals Dr. Ron Rusay 2002 © Copyright 2002 R.J. Rusay Energy Can be defined as the capacity to do work, i.e. moving an object by applying force to mass over a distance Chemical energy is defined as heat. Name five other types of Energy. Two Types of Energy Potential: due to an object’s position or material’s composition - which can be converted to work Kinetic: due to motion of an object = 1/2 mv2 (m = mass, v = velocity) KE Record Gasoline Production Likely Throughout 2002 Sources: History: EIA; Projections: Short-Term Energy Outlook, March 2002. Law of Conservation of Energy Different forms of energy can be inter-converted but can neither be created nor destroyed. (Euniverse Describe is constant) three inter-conversions of energy. First of Three Laws of Thermodynamics First Law of Thermodynamics: The energy of the universe is constant or “energy is conserved”. What is a greenhouse gas? The sun’s energy & the molecule’s shape decide. •Our atmosphere (air) is 78% nitrogen and 21% oxygen. •Neither are greenhouse gases. They do not absorb infrared radiation (heat). •However, H2O and CO2 can absorb infrared energy. Without them earth would be very chilly. http://zebu.uoregon.edu/1998/es202/l13.html What do the sun’s energy, a molecule’s shape and a TV remote have to do with greenhouse gases? QuickTime™ and a GIF decompressor are needed to see this picture. http://chemistry.beloit.edu/Stars/EMSpectrum/index.html
