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The answer has pretty much been given in the comments, but I think a nice pictorial representation might help. The mathematical form of a standing wave is $$y(x) = \sin \left(\frac{2 \pi}{ \lambda} x \right) $$ Here $y(x)$ is the displacement of the string at point $x$. If we plot the waves for the four wavelengths we obtain the following picture I will ...


I would reach for an Arduino or similar microcontroller to do the job. You can set the amplitude and frequency of the vibration in code which, in my experience, is always easier than tweaking an electronic circuit.


Your question is possibly too specialised for Physics SE. It might be better in Engineering SE. You might also try an Internet Search. The reasons for choosing one over the other might be specific to naval architecture, which I know very little about. Intuition tells me to balance at source. This introduces a compensating force in the same plane, which ...


There are 4 vibrational modes in a molecule like CO2 like you are considering. These would be a symmetric stretch, an antisymmetric stretch, and 2 bends (just like your animations). In case of non linear molecules there is only one vibrational bend: Lets consider H2O. You might be tempted to think that the same argument of two bends should apply here, but on ...

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