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Ever heard about antiresonance? As the name suggests it is opposite of resonance, which is hardly taught in elementary classes. Considered two coupled oscillators where one is forced with say a harmonically driven force and other with without any forcing, just like the building and the TMD system, where the building is forced by say some seismic vibrations. ...

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A time-reversible system in physics, put simply, is one such that if you start with a initial configuration at time $t_0$, evolve the system until time $t_1 > t_0$, then, and this is the important part, reverse the VELOCITY dependant variables (e.g. momentum), and let the system evolve it will return to the original state in the $t_1 - t_0$ amount of time....

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So will it not make the power at the secondary side more that the power No. A transformer cannot generate power out of thin air and so the power on both sides is (roughly) the same. That means if the voltage on the secondary side is higher then the secondary current is actually lower than the primary. Let's look at simple example. Let's say you have a ...

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You don't seem to be considering the currents in the primary and secondary. If you connect a resistive 'load', for example an old-fashioned filament lamp, across the secondary, there will be a current through it. There will then also be a (larger) current through the primary in a step-up transformer. To a fair approximation, the mean power supplied to the ...

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Sound is just pressure waves propagating back and forth, so kinetic energy, when it gets absorbed by an object it just jiggles its constituent particles, so basically it stays kinetic energy; macroscopically you could say it turns into thermal energy since the thermal energy of an object is the total kinetic energy of its constituent atoms/molecules.

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