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Question 1. Not many inventions last for more than 100 years without major modifications. One of these is the incandescent light bulb, which still produces almost half of the artificial light used in homes around the wor
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Document Date: 2014-05-08 02:05:42
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Question 1. Not many inventions last for more than 100 years without major modifications. One of these is the incandescent light bulb, which still produces almost half of the artificial light used in homes around the wor