3 1) Consider an aerosol consisting of particles with densities of 1.0 g cm in air at 1 atm and 20 C. a) Calculate the particle size at which the mean displacement in one second 1n one dimension due to Brownian motion is equal to the distance settled due to gravity. b) For a particle with a diameter 0.1 times that determined in (a), how much larger 1s the displacement due to Brownian motion compared with that due to settling in one second? c) For a particle with a diameter 10 times that determined in (a), how much larger 1s the distance settled in one second compared with displacement due to Brownian motion