Enrico Fermi, the great Italian scientist, was a master at making good approximate
Chapter 21, Problem 21.39(choose chapter or problem)
Enrico Fermi, the great Italian scientist, was a master at making good approximate calculations based on little or no actual data. Hence, such calculations are often called Fermi calculations. Do a Fermi calculation on how long it would take for a gaseous air-borne cold virus of molar mass 100 kg mol1 to travel the distance between two conversing people 1.0 m a part by diffusion in still air.
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