Question

What is diffusion?
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Answer 1

Answer:

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Diffusion is the movement of a substance from an area of high concentration to an area of low concentration. 

Answer 2

Diffusion is the net movement of anything from a region of higher concentration to a region of lower concentration. Diffusion is driven by a gradient in concentration. The concept of diffusion is widely used in many fields, including physics, chemistry, biology, sociology, economics, and finance.