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World Languages, 04.12.2020 19:00 pr47723

Which detail from “Thomas Edison: The Master of Improvement” explains why Swan’s lightbulb failed to be successful? “He developed and demonstrated the first small lightbulb in 1878.”
“Its glow was produced by electricity passing through a filament, or tiny piece of material.”
“The inside of the glass bulb was a vacuum. In other words, it was oxygen-free.”
“[The] bulb did not glow for long, however. It produced light for only thirteen hours.

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Which detail from “Thomas Edison: The Master of Improvement” explains why Swan’s lightbulb failed to...
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