An air current moving vertically upward at 5 m/s carries raindrops of various sizes. Calculate the velocity of a 2-mm-diameter drop and determine whether it is rising or falling. Repeat this exercise for a 0.2-mm-diameter drop. Assume standard atmospheric pressure and air temperature 20˚C. Air density = 1.20 kg/m3.

Answer rating: 100% (QA)

Drag on the droplet exerted by the air current moving in the vertical upward direction is 05 Cd A V2 ... View the full answer