b)Leadisrarelyusedtomakepencils.Whyso?
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28
Answer:
The core of a pencil does not contain lead and never has. Pencils contain a form of solid carbon known as graphite. According to the book The Pencil by Henry Petroski, the graphite pencil was first developed and popularized in the 1600's.
Answered by
39
Answer:
The core of a pencil does not contain lead and never has. Pencils contain a form of solid carbon known as graphite. According to the book The Pencil by Henry Petroski, the graphite pencil was first developed and popularized in the 1600's.
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