Read the excerpt from "Thomas Edison: The Master of Improvement.”Its glow was produced by electricity passing through a filament, or tiny piece of material. The inside of the glass bulb was a vacuum.

Name: Revolt
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Question

Revolt · Accepted Answer

a very small piece of material

Unit Test

Read the excerpt from "Thomas Edison: The Master of Improvement.”Its glow was produced by electricity passing through a filament, or tiny piece of material. The inside of the glass bulb was a vacuum.

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