useful energy
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![Page 1: Useful Energy](https://reader036.vdocuments.us/reader036/viewer/2022082310/5453c69eaf7959a4058b679d/html5/thumbnails/1.jpg)
![Page 2: Useful Energy](https://reader036.vdocuments.us/reader036/viewer/2022082310/5453c69eaf7959a4058b679d/html5/thumbnails/2.jpg)
To know what useful and wasted energy are.
To know and explain how energy can wasted.
![Page 3: Useful Energy](https://reader036.vdocuments.us/reader036/viewer/2022082310/5453c69eaf7959a4058b679d/html5/thumbnails/3.jpg)
If all energy transfers were perfect, theuseful energy output from an appliancewould be the same as the input energy. In practice, however, some wastedenergy is nearly always produced during
the conversion.
![Page 4: Useful Energy](https://reader036.vdocuments.us/reader036/viewer/2022082310/5453c69eaf7959a4058b679d/html5/thumbnails/4.jpg)
The Total Energy Input = Total Energy Output
Energy is not created or destroyed
The Output Energy is always in twoor more forms which can be Usefulor Wastage Energies.
![Page 5: Useful Energy](https://reader036.vdocuments.us/reader036/viewer/2022082310/5453c69eaf7959a4058b679d/html5/thumbnails/5.jpg)
Refer to the energy animated diagram
number 3
![Page 6: Useful Energy](https://reader036.vdocuments.us/reader036/viewer/2022082310/5453c69eaf7959a4058b679d/html5/thumbnails/6.jpg)
What is useful energy?
Is energy transferred in the form and where it is desired.
![Page 7: Useful Energy](https://reader036.vdocuments.us/reader036/viewer/2022082310/5453c69eaf7959a4058b679d/html5/thumbnails/7.jpg)
Is the energy that is not usefully transferred or
transformed.
Refer to example of energy wasting in no. 6
![Page 8: Useful Energy](https://reader036.vdocuments.us/reader036/viewer/2022082310/5453c69eaf7959a4058b679d/html5/thumbnails/8.jpg)
What is useful energy?http://www.youtube.com/watch?v=ywJ3WGpf0hw&NR=1&feature=fvwp
![Page 9: Useful Energy](https://reader036.vdocuments.us/reader036/viewer/2022082310/5453c69eaf7959a4058b679d/html5/thumbnails/9.jpg)
Refer to Energy animated diagrams on page 4, 5 and 6.
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http://www.yteach.co.uk/page.php/resources/view_all?id=Domestic_Tungsten_electrical_energy_trees_candle_thermal_energy_chemical_energy_light_energy_conservation_kinetic_energy_electrical_energy_Converting_energy_t_page_7&from=search
![Page 11: Useful Energy](https://reader036.vdocuments.us/reader036/viewer/2022082310/5453c69eaf7959a4058b679d/html5/thumbnails/11.jpg)
1. Give answers to questions a and b on page 246 and question c on page 247.
2. Do the summary questions 1, 2 and 3 on page 247.