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Law of Conservation of Energy

Law of Conservation of Energy. “Energy CANNOT be created nor destroyed, but can be converted from one FORM to another.” Remember this… The amount of energy we start with is what we must end with. Law of Conservation of Energy--Examples.

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Law of Conservation of Energy

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  1. Law of Conservation of Energy “Energy CANNOT be created nor destroyed, but can be converted from one FORM to another.” Remember this… The amount of energy we start with is what we must end with.

  2. Law of Conservation of Energy--Examples Example #1: Electromagnetic energy from the sun (light) is converted to electrical energy (electricity) using solar panels (photovoltaic cells)

  3. Law of Conservation of Energy--Examples Ever seen these? Source of picture: http://www.aboutmyplanet.com/files/2009/01/solar_panel.jpg

  4. Law of Conservation of Energy--Examples Source of picture: http://worldclimateissues.files.wordpress.com/2010/01/solar-panels-roof1.jpg

  5. Law of Conservation of Energy--Examples Source of picture: http://f00.inventorspot.com/images/Solar%20Panels.jpg

  6. Law of Conservation of Energy--Examples Source of picture: http://kkrugler.files.wordpress.com/2008/03/solar-panels.jpg

  7. Law of Conservation of Energy--Examples Example #2: Green plants convert the sun’s electromagnetic energy (light) into starches and sugars (chemical energy) through the process of photosynthesis. Source of picture: http://techalive.mtu.edu/meec/module10/images/photosynthesis.jpg

  8. Law of Conservation of Energy--Examples What do we do with the plants? Is another conversion taking place? ____________ ___________

  9. Law of Conservation of Energy--Examples Example #3: In a toy, the batteries convert chemical energy into electromagnetic energy (sound) Source of picture: http://hearingaiddocs.files.wordpress.com/2009/12/loud-toy1.jpg

  10. Law of Conservation of Energy--Examples If the battery operated toy MOVES, what energy conversion is taking place? ____________ ___________

  11. Law of Conservation of Energy--Examples • Example #4: • Hydroelectric Power • The mechanical energy of moving water is converted to electrical energy. • The Hoover dam outside of Las Vegas powers all of the state of Nevada and most of southern California.

  12. Law of Conservation of Energy--Examples Source of picture: http://www.centralbasin.org/blog/wp-content/uploads/2009/03/hoover-dam-directions.jpg

  13. Law of Conservation of Energy--Examples Source of picture: http://geochange.er.usgs.gov/sw/changes/natural/codrought/dam.jpg

  14. Law of Conservation of Energy--Examples The Grand Coulee dam here in Washington State… Source of picture: http://www.physics.uiowa.edu/~umallik/adventure/nov_06-04/Grand%20Coulee%20Dam.jpg

  15. Law of Conservation of Energy--Examples Niagara Falls… Source of picture: http://www.wrightnowinbuffalo.com/whattodo/images/niagara-falls1.jpg

  16. Law of Conservation of Energy--Examples Source of picture: http://www.canadacool.com/COOLFACTS/ONTARIO/ONTARIOPHOTOS/Niagara-Falls-Flow.jpg

  17. Law of Conservation of Energy--Examples Example #5: Another example of generating electrical power with energy conversions… Wind Mills The mechanical energy of moving air is converted to electrical energy.

  18. Law of Conservation of Energy--Examples Source of picture: http://planning.up.nic.in/innovations/inno3/ae/images/wind_mill.jpg

  19. Law of Conservation of Energy--Examples Source of pictures: http://www.epodunk.com/cgi-bin/genInfo.php?locIndex=10808 http://www.wildnatureimages.com/images%203/060302-071..jpg

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