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what is the meaning of the magnitude and direction of the arrows on the surface ?

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The arrow surface with local velocity is plotted. Does the velocity is the particle velocity? since the vibration of the particle is simple harmonic vibration, why the directions of the arrows are in the same direction?



0 Replies Last Post Jun 26, 2019, 8:24 a.m. EDT
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Hello 雷 韩

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