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Card 4 / 9:
Consider the fact that the light bulb and the telephone were invented only three years apart. Although it took many more years for such devices to find their way into common household use, they eventually wrought major changes in a relatively brief period of time. What effects did these inventions have on the lives of those who used them? Are there contemporary analogies in your lifetime of significant changes due to inventions or technological innovations?
The course author didn't provide an answer for this question
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