aerosol size distribution were taken. Size interval (µm) Geometric mean of size interval (um) Number of particles in interval 0.1-0.2 0.1414 50 0.2-0.4 0.2828 460 0.4-0.7 0.5292 1055 0.7-1.0 0.8367 980 1.0-2.0 1.414 1705 2.0-4.0 2.828 680 4.0-7.0 5.292 102 7.0–10 8.367 10 10-20 14.14 Assume that the particles are spheres with density p,=1.5g cm. a. Determine the geometric mean diameter and geometric standard deviation of the lognormal distribution to which these data adhere.

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