- #1

Observeraren

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So I just poured water in a glass to clench my thirst. Hit the 2/3 empty glass with a pen and a high frequency started resonating for a brief moment, which I percepted as sound. When I tilted the glass the tilt resulted in change of frequency. When the glass was empty there was no change in frequency. The frequency did not change when the glass was rotated in such manner that the water did not change it's horizontal positioning or not atleast in a way that was observable by ear.

This left me thinking that the vertical movement of the water interfiered with the resonance of the glass, "damping" the vibrations at the direction of the tilt. But at the same time the horizontal tilt is releasing vertical space in the opposite direction of the tilt. So this does not make much sense, does it?

Then I'm left wondering how the series of vibrations are perpendicular to the glass or am I looking at this from a completely wrong angle? Or is the work done from the force behaving like a wave? I have a tiny tickle of this but I could be so wrong, afterall having nearly no education in physics.

I've just started dabbling in Fourier Series by Georgi P. Tolstov, starting with introduction to real analysis by A.N.Kolmogorov & S.V.Formin, which is way ahead of me considering that I have not yet finished the book on fundamental concepts of algebra which I find easily understandable.

Kind regards; Observeraren

This left me thinking that the vertical movement of the water interfiered with the resonance of the glass, "damping" the vibrations at the direction of the tilt. But at the same time the horizontal tilt is releasing vertical space in the opposite direction of the tilt. So this does not make much sense, does it?

Then I'm left wondering how the series of vibrations are perpendicular to the glass or am I looking at this from a completely wrong angle? Or is the work done from the force behaving like a wave? I have a tiny tickle of this but I could be so wrong, afterall having nearly no education in physics.

I've just started dabbling in Fourier Series by Georgi P. Tolstov, starting with introduction to real analysis by A.N.Kolmogorov & S.V.Formin, which is way ahead of me considering that I have not yet finished the book on fundamental concepts of algebra which I find easily understandable.

**TL;DR:**A glass is filled with an unsubstantial amount of water. When I tilt the glass that as been struck with force. Why does the frequency of the resonation change.**I did not take to my count that the water also forwards the force. But I'll leave this question to you for now.**

EDIT:EDIT:

Kind regards; Observeraren

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