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what is random motion

Question

what is random motion

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Solution

Random motion, also known as Brownian motion, is a physical phenomenon where particles suspended in a fluid (a liquid or a gas) move in an irregular, unpredictable manner. This motion is caused by the continuous, random bombardment from molecules of the surrounding medium.

Here are the steps to understand it:

  1. Consider a particle suspended in a fluid. This could be a grain of pollen in a drop of water, for example.

  2. This particle doesn't stay still. It moves around, but not in any predictable or regular way.

  3. If you look at the particle under a microscope, you'll see it darting around in all directions. This is random motion.

  4. The reason for this random motion is that the particle is constantly being hit by the molecules of the fluid it's in. These molecules are moving around randomly, and when they hit the particle, they push it in a new, random direction.

  5. This constant, random bombardment from all sides causes the particle to move in a random, unpredictable way. This is what we call random motion or Brownian motion.

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