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Full set of Notes with Fill-Ins - San Jose State University

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Chem 155 Unit 13 Page 244 <strong>of</strong> 316Group frequencies can be calculated approximately:Interatomic forces are approximated by Hooke’s Law:F =k · ySince F = mA (Newton’s Law)d 2 yF = mA = m = ky(t)y(t) is proportional to its own second derivative.This differential equation has a sinusoid solution:dt 2y(t) = A cos(2πν m t) ν m =1 k2π μμ =m 1 m 2m 1 + m 2reduced massUnits <strong>of</strong> μ are:Page 244 <strong>of</strong> 316units <strong>of</strong> mass

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