we are able to smell the Aroma of food cooked in our neighbourhood house. why ?
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because the aroma of food flows in with air whe. it is hot
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There is a phenomenon called Diffusion.
In diffusion, molecules of solid, liquid or gas spread from the region of their higher concentration to the region of their lower concentration. When we cook food in the kitchen, that's the region of higher concentration of the smell. By diffusion, the smell spreads to the whole room and thereby whole house, so anyone standing at a distance, Can smell it.
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