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How many miles can a pencil write?

How many miles can a pencil write?


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An average pencil can write about 45,000 words, or a line about 35 miles (55 km) long
Posted 2007-10-27T20:34:55Z
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Love is the battery of life....

Hi,


With all respect I doubt this figure (35 miles).  Pencils can be very hard or very soft (there is a scale from 9B [the softest] to 9H [the hardest).  The softer perncils consume more graphite while writtiing (hence will write less).   I am sure that a pencil will write more than 35 miles, and probably much more..... I am sure that if I wrote a line 1 mile long it wouldn't use even 1 milimeter of the graphite....... In fact the question made me anxiouse and I decided to test it: I drew a line 1 mile long and it consumed very little graphate !.  (A4 paper, regular office pencil). 
Best regards,   
Posted 2007-10-28T08:23:53Z
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My physics class used #2 pencils with 160mm of usable graphite and drew lines on 28 cm (11 in) paper.  Each team measured the length of their pencils then drew 200 straight lines on the paper = 5600cm = 56 meters (183 ft).  The pencil's average loss of graphite was 3mm.  Our calculations reveal that an average # 2 pencil would generate a line 2.77 miles long (following conversion from SI to English units!). 
Posted 2008-09-11T15:47:31Z
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