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igcse physics notesprinted 75 · PDF 75
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printed 75 · PDF 75
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Brownian Motion
It is the random, zigzag movement of particles in fluids due to collisions with invisible,
fast moving particles like atoms or molecules. It shows us the existence of much smaller
particles. For example, pollen compared to air molecules. The fast moving air molecules
collide with the pollen molecules and cause this random motion .