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In physics "principles" are statements that can be derived from the basic laws . Basic_laws/postulates in physics are like axioms in mathematics, they tie up observations to the mathematical model, and one cannot ask "why" since the only answer is "because this is/fits what we observe". Your statement is partially reflected in this principle: The ...


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No. The question is based on a false assumption. Nothing "seeks ground" in the sense the expression implies. Current flows in an electrical circuit. If part of the circuit is connected to "ground" then current will flow into or out of ground as part of flowing in the circuit as a whole. If you look at the "circuit diagrams" of electric circuits, in many ...


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I would think the vibrations to be mindful of would include any type of propulsion, thrusters, etc, also any internal electrical motors, actuators, power supplies, etc. Moreover, I would also think essentially anything electrical-related e.g. wiring, capacitors, etc since electrical parts are known to vibrate when current is passing through them. I'm ...


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I can't answer your question specifically. But I suspect between the continuous combustion of 4 to 8 cylinders and all the moving parts of the typical internal combustion engine, if one could expediently redirect that vibrating energy away from the motor, one could greatly improve the engine's trueness of operation. Which should provide far greater ...


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The Linear Quadratic Regulator (LQR) and Linear Quadratic Gaussian (LQG) control are typically used in Optimal Control methodology where the basis of the control action comes from minimizing a cost function. The LQG approach typically involves modeling your system in state space, designing an observer to estimate the system states, and figuring out a gain ...


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Every color you see is an electromagnetic wave, and the color depends on the frequency of the wave. When you synthesize a sound wave, what you're actually doing is create waves of air pressure, with the frequency corresponding to a certain pitch. If you want to "synthesize a color", what you actually want to do is to generate light, i.e, an electromagnetic ...


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I believe this is the "missing link", stated in a less abstract fashion than in the above comment: https://en.wikipedia.org/wiki/Quadratic_form . Some programs in physics cover that in undergraduate algebra courses, some leave it for later. Notably, this method doesn't apply just to tensors, it's a general connection between symmetric matrices (of spaces ...


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I have solved my problem with some careful head scratching and reading. It turns out I misread the paragraph after Eq. (2.9). This is NOT the integration formula, just a statement of the boundary condition value for P as R -> inf and U -> constant. It provides the first two values needed for the rest of the inwards integration. The correct formula to use ...


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Why the rear window? The sound occurs when wind is blown across a lip: At the arrow, the wind is blowing like the air that a flutist blows across the mouthpiece - so it sets up a resonance. Now for a resonance to work, the cavity must have a sufficiently high "Q" - quality factor. The air must reflect from most surfaces, and only have a limited chance ...



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