It can be shown that fick's law of diffusion can be adapted to find that the time for the first solute molecule to travel a distance list = l2/(2d). suppose the diffusion constant for molecules of some unpleasant odor in air is 1.8 x 10-5 m2/s. roughly how far will the odor travel in 60 s?

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c