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Written by Nuntaya
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Monday, 02 April 2012 12:45 |
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ที่มา : www.youtube.com Upload by MIT
In this lecture Processor Lewin introduces elasticity and Young's modulus. The fractional length deformation of a material (the strain) depends on the force per unit area (the stress). The stress vs. strain dependence is described conceptually, then explored empirically. The speed of sound in a material depends on the stiffness and density of the material; from this follows the fundamental frequency at which a rod resonates.
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