87. Calculate the time of settling of sand particles of sizes 10-5 and 10-8 m in water from a height of h = 0.1 m, using the data from problem 77. Assess the sedimentation stability of dispersed systems.
Problem 90.
Using the data from problem 87, calculate and compare the settling time of ammonium chloride aerosol particles from a height of 10 m.

If the file does not open for you, install the Rar archiver program. Inside the archive, the solution is in WORD format.