Gravitational dispersion in a torsional wave machine

@article{Madrid2014GravitationalDI,
  title={Gravitational dispersion in a torsional wave machine},
  author={Rafael de la Madrid and Alejandro G Gonz{\'a}lez and George R. Irwin},
  journal={American Journal of Physics},
  year={2014},
  volume={82},
  pages={1134-1141}
}
We demonstrate that mechanical waves traveling in a torsional, mechanical wave machine exhibit dispersion due to gravity and the discreteness of the medium. We also show that although the dispersion due to discreteness is negligible, the dispersion due to gravity can be easily measured and can be shown to disappear in a zero-gravity environment. 

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SHOWING 1-5 OF 5 REFERENCES

The Iowa wave machines

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Dispersion, Reflection, and Eigenfrequencies on the Wave Machine

A simple theory of the Wave Machine (Bell Telephone Laboratories) is presented. It takes into consideration the discrete structure of the vibrating system. The dispersion relation and formulas for

Making waves: A classroom torsional wave machine (Part I)

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