Bananas for Scale
Pencil Line (Continuous)

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Pencil Line (Continuous)

The humble graphite trail of human thought/Everyday Objects

A standard No. 2 pencil can draw a continuous line approximately 56 km long before the graphite is depleted. The line is about 0.5 mm wide and consists of layers of graphite just a few atoms thick being deposited onto paper. A pencil contains about 50 mg of graphite, which is pure carbon arranged in hexagonal sheets that slide apart easily, leaving a mark. Pencils work in zero gravity and underwater.

Measurements

Maximum line length56,000 m
31,111Taylor Swifts
84,848Pillow lengths

About 56 km

Line width500 millionths m
41.7 millionthsT-Rex body lengths
1.1 millionthsPetronas Tower heights

0.5 mm typical

Graphite consumed50 millionths kg
16,667Fruit fly eggs
50 millionthsPineapples
36.8 millionthsCostco rotisserie chickens

About 50 mg

Graphite layer thickness on paper1 billionths m
1.3 billionthsBar stool heights
13.2 billionthsHockey puck diameters
556 trillionthsTaylor Swifts

A few nanometers

Total area covered28 m^2
231 billionthsSan Franciscos
5,600Business cards

56 km x 0.5 mm

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