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302 bytes removed ,  22:14, April 13, 2012
→‎The uncertainty principle: Brownian motion has nothing to do with quantum mechanics
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* Dp = uncertainty in momentum
 
* Dp = uncertainty in momentum
 
* h = [[Planck's Constant]]
 
* h = [[Planck's Constant]]
  −
This is what causes [[Brownian motion]] of dust particles in the air.  Due to the uncertainty principle, each individual air molecule moves randomly.  At any given time, more molecules are randomly hitting each dust particle on one side than the other; therefore, it randomly floats in one direction.
      
==Interpretations==
 
==Interpretations==
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