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I think they are probably trying to characterize small mechanical devices. One part of this analysis would be analyzing their motion. One motion it can do is to vibrate. If the wavelength of the vibration is much smaller than the size of the object, then the vibration can't tell how small the object is, and the vibration will behave the same way it would ...


When there is only one type of atom, we only need one equation of motion. When there are two types of atoms, we need two equations, one for each type. For example, a FCC lattice with the corners occupied by one type of atom, and the face centers occupied by another type requires two equations. The number of neighbors does not increase the number of ...

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