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Click to view video clip
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Energy can be converted from 1 form to another.
In some cases, energy is converted in a series of steps.
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When energy changes from 1 form to another, the total energy remains unchanged even though many energy conversions may occur.
The law of conservation of energy states that energy cannot be created or destroyed.
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In a closed system, the amount of energy present at the beginning of a process is the same as the amount of energy at the end.
(In a closed system, nothing can enter or leave.)
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The gravitational PE of an object is converted to the KE of motion as the object falls.
Ie: This is what happens when an avalanche brings tons of snow from the top of a mountain to the valley floor.
View Simpson clip
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This simulation is assuming that there is no air friction and no friction in the pivot point of the rope.
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1. Where does the pendulum have the highest velocity? At the very bottom
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1. How does the original height of the pendulum compare to its final height? It’s the same
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A pole-vaulter converts KE into PE in order to propel himself high into the air.
Figure links to animation site.
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Click to view video clip
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Exist in limited quantities. They cannot be replaced except over
the course of millions of years. Examples
› oil› natural gas› coal› uranium
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Resources that can be replaced in a relatively short period of time.
Most originate either directly or indirectly from the sun.
Examples- - geothermal - - wind- - biomass - - solar- - hydroelectric
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You will research the pro’s and con’s of the various renewable energy sources in a data table.
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