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14. Sources of Energy
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Q104 of 141 Page 14

Give the limitations in using commercially wood as fuel, over windmills.

Basic commercial fuel used is wood, because of its abundance in existence. Another fact is it is non-renewable but windmill energy is a renewable source of energy.

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102 Give the purpose of mirror and glass sheet in solar cooker. 103 Why are solar cells not used effectively? 105 A student constructed a box type solar cooker. He found that it is not working efficiently. What could this be due to? Give any four possible mistakes that he could have made? 106 What are the advantages of using solar water heater? Draw a labeled schematic diagram for a solar water heater.
Questions · 141
14. Sources of Energy
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