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Brownian motion

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Summary

In fluids, microscopic particles move in a random and irregular manner due to the constant agitation of the atoms and molecules which make up the surrounding medium. The hotter the medium is the faster the particles move. Each collision with the surrounding medium causes the particles to accelerate. Between two collisions, their movement is straight and at a steady speed.

Click into the screen to make the little black particles appear/disappear.

Click into the screen to make the little black particles appear / disappear. 

Learning goals

  • To illustrate Brownian motion and the influence of varying temperatures.

Keywords

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The movements of each particle are random and cancel one another in such a way that no overall displacement can be measured. At absolute zero (0 K) the particles are thought to be immobile. The…

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