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According to the Wikipedia article on String theory, At sufficiently high energies, the string-like nature of particles would become obvious. There should be heavier copies of all particles, corresponding to higher vibrational harmonics of the string. It is not clear how high these energies are. In most conventional string models, they would be close to ...


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For the pipe, it is the air that is vibrating. When the column of air is shorter the frequency is higher. In the case of the wine glass, the glass (not the air) is vibrating. Add water and you increase the inertia of the glass, which lowers the frequency of the resonance. The air may also resonate - but for something the size of a wine glass the frequency ...


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The qualitative reason is in the case of the pipe, the walls can be assumed for practical purposes to be rigid (i.e. they don't vibrate), and the resonant frequency of the vibrations in the air inside is determined by the boundary conditions. In other words, the shorter the air column in the pipe (more water), the shorter the wavelengths of the acoustic ...


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There is two part in a pipe column : the excitation and the cavity The cavity select a wavelenght depending on its length. But the small open you see in a pipe, it's a menbrane which vibrate with every frequency as you blow (you create something that have every wavelength). It's only the cavity that will choose the good frequency/wavelenght. the stream ...


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The method that WiTricity implements is that of magnetic resonance coupling. Resonance is done to ensure efficient exchange of energy between the transmitter and the receiver. The method is very simple. If you take a coil and pass alternating current through it, it will produce alternating magnetic field around itself (like a solenoid). Now, place another ...


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No, only some baryons form a decuplet under SU(3) flavor symmetry, specifically those 10 spin 3/2 baryons formed from up, down,and strange quarks,depicted in the following diagram (figure credit Wikipedia baryon article , figure listed as public domain): On the diagram $Q$ is electric charge, $I_3$ is isospin, and $S$ is the strangeness quantum number. ...


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Organ pipe, whistles, and the like are not fed with pulses of air. Think about it. You blow into a whistle steadily, but yet what comes out is 1000 pulses per second or so. You certainly aren't huffing 1000 times/second into the whistle. Whistles and organ pipes are their own oscillators. You put in power in the form or moving air, and that gets turned ...


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In order to properly understand this without any unnecessary "controversy", let's break the whole process of sound generation and perception into 5 important, but completely separate parts. We'll then proceed to explain each part using a few different examples and pieces of derivative logic: Vibration of the vocal folds Transmission of energy from vocal ...



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