【正文】
substitute into Stokes’ law and find the terminal settling velocity as 3. Solution: a. z=, , so that b. 4. Solution: a. First we pute that for 40 particles ,and 10 particles , Then we make up the following tableD()np0100104040+00b. 66% pass through uncollected, so the 50% point of that group corresponds to the 33% point of the original distribution. For it ,