Energy - Energy Energy Without energy nothing happens Energy does work Energy Work is done when objects are moved or Work heated heated Energy is

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Unformatted text preview: Energy Energy Without energy nothing happens. Energy does work! Energy Work is done when objects are moved or Work heated. heated. Energy is never ‘used up’ it is simply Energy converted from one form to another. Can converted you think of some sources of energy? you Fuels and food are sources of energy. Can you think of any examples when Can energy is converted from one form to converted another? another? Converted Energy Converted Fuels for generating electricity. There are 3 main classes of fuel which can There be used to generate electricity: be Fossil fuels, renewable fuels and nuclear Fossil fuels. fuels. What are fossil fuels? What What are renewable fuels? What How are these fuels used to generate How electricity? electricity? Energy is released from the fuel. Energy Fossil fuels such as gas, coal and oil and Fossil renewable fuels such as wood are burnt and heat is generated. and This heat is used to boil water and the This steam that is created is used to turn large propellers called turbines. propellers These turbines then turn electrical These generators. generators. In addition to these fuels there are other energy sources used to generate electricity. Can you think of any? Can Other energy sources Other Solar power: converts the energy of the sun into Solar electricity. electricity. Wind power: Moving air can be used to turn Wind propellers. propellers. Hydroelectric power: using water. The higher the Hydroelectric drop and the greater the drop, the more energy can be created. Wave power: wind causes waves to form on the water and the motion of these waves can be used to turn generators. used What have we learnt? What Energy does work. Energy is never ‘used up’ it is simply converted from one Energy form to another. form Fuels and food are sources of energy. There are 3 main classes of fuel which can be used to There generate electricity: Fossil fuels, renewable fuels and nuclear fuels. Fossil fuels such as gas, coal and oil and renewable fuels such as wood are burnt and heat is generated. fuels This heat is used to boil water and the steam that is This created is used to turn large propellers called turbines. created These turbines then turn electrical generators. There are other sources of energy such as: Solar power, There wind power, hydroelectric power and wave power. wind These photographs show ways of getting energy from four different energy sources, can you name them? can ...
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This note was uploaded on 11/29/2011 for the course PHYS 122 taught by Professor Terry during the Fall '11 term at BYU.

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