Physics, 18.02.2020 19:57 sashajayne8260
The "lead" in pencils is a graphite composition with a Young's modulus of about 1 ✕ 10⁹ N/m². Calculate the change in length (in mm) of the lead in an automatic pencil if you tap it straight into the pencil with a force of 4.9 N. The lead is 0.70 mm in diameter and 55 mm long.
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The "lead" in pencils is a graphite composition with a Young's modulus of about 1 ✕ 10⁹ N/m². Calcul...
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