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3-072-S-EarthQuake Part I
06 Aug 2021 | | Contributor(s):: Tracy Weyand
This modeling scenario considers a one-story building as a simple structure; the roof is modeled as a single point mass. Movement of the roof can be modeled similar to a mass-spring system. In this activity, students will analyze the motion of the roof caused by ground movement. Here we...
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3-073-S-EarthQuake Part II
06 Aug 2021 | | Contributor(s):: Tracy Weyand
This modeling scenario considers a one-story building as a simple structure; the roof is modeled as a single point mass. Movement of the roof can be modeled similar to a mass-spring-damper system. In this activity, students will analyze motion of the roof under different damping and vibration...
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3-105-S-FrequencyResponse
22 Jul 2020 | | Contributor(s):: Brian Winkel
We describe the frequency response to a second order differential equation with a driving function as the maximum steady state solution amplitude and perform some analyses in this regard.
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4-055-S-ShatterWineGlass
20 Aug 2018 | | Contributor(s):: Jue Wang
This module takes students through real life scenarios to examine resonance and its destructive power using differential equation models. What is resonance? How does it happen? Why is it important? Three cases are presented: shattering a wine glass, collapse of a suspension bridge, and crash of...
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4-060-S-CircuitTuner
20 Sep 2016 | | Contributor(s):: Brian Winkel
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9-012-S-PDEGuitarTuning
04 Jun 2015 | | Contributor(s):: Brian Winkel
We present a derivation of a partial differential equation which models the motion of a string held at both ends, a case of the one-dimensional wave equation. We immediately offer numerical solutions in a computer algebra system (we use Mathematica, but any...