A spherical raindrop 1.7 mm in diameter falls through a vertical distance of 4400 m. Take the cross-sectional area of a raindrop = Irrz, drag coefcient = 0.45, density of water to be 1000 kg/m3, and density of air to be 1.2 kg/m3. (a) Calculate the speed a spherical raindrop would achieve falling from 4400 m in the absence of air drag. m/s (b) What would its speed be at the end of 4400 m when there is air drag? (Note that the raindrop will reach terminal velocity after falling about 30 m.) m/s ll