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Published byEllen Doyle Modified over 9 years ago
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CONSERVATION OF ENERGY Energy can neither be created nor destroyed; it can only be transformed from one form to another.
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How much PE? How much KE?... In what direction?
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Why doesn’t it hit your face? The total energy of a system must be conserved… But energy can be converted to: heat, sound, light, etc… and essentially is “lost”
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http://www.dot.state.co.us/WolfCreekPass/Images/Rock%20Blast.jpg http://www.davesfireworks.com/brev_files/dynomite.jpg Chemical Potential ENERGY WORK done on rocks
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http://www.vikingrange.com/recipes/recipe_images/banana_pancakes_large.jpg http://www.woodsfamilyclimbs.com/albums/album16/980800_030_Approa ching_the_Diamond_of_Longs_Peak.jpg Chemical ENERGY WORK done by Hiker
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http://www.industcards.com/cherokee-co.jpg Chemical Potential ENERGY WORK done on Steam Turbine Cherokee Coal Fired Power Plant http://members.shaw.ca/onefishy/engine_room/steam%20turbine%20rotor.02.jpg
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http://paulm.com/pix/me/rides/240sx/pauls_bass_bins.jpg http://www.harunyahya.com/kids/images_wonders/031a.jpg Sound ENERGY WORK done on ear
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http://www.bierstall.de/images/Hoover%20Dam%202.jpg Gravitational Potential ENERGY http://www.ap.org/westwire/Vegas.jpg WORK done by lights Hoover Dam, NV Las Vegas, NV
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200 m 1 Liter of water has a mass of 1kg. If the dam allows 15,000 gal/sec (1gal = 3.78L) to flow through, what is the max amount of electrical power this dam’s turbines can put off?
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Gas http://us1.webpublications.com.au/static/images/articles/i10/1066_10mg.jpg Chemical Potential ENERGY WORK done by Car
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If gasoline has 1.32 x 10 8 Joule/gal of potential energy… and the engine is 20% efficient, how much gas will it burn for the 1600kg car to climb a 100 m tall hill? 100 ft
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Place cup at known distance from ramp (you choose)… using what you already know plus the new energy/work stuff, calculate the height on the ramp you need to release a ball from to land it in the cup! If you succeed you are done… if not, determine the amount of energy lost to friction, air resistance… even sound.
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