A spherical raindrop 3.1 mm in diameter falls through a vertical distance of 4300 m. Take the cross-sectional area of a raindrop = a, drag coefficient = 0.45, density of water to be 1000 kg/m, and density of air to be 1.2 kg/m (a) Calculate the speed a spherical raindrop would achieve falling from 4300 m in the absence of air drag. m/s (b) What would its speed be at the end of 4300 m when there is air drag? (Note that the raindrop will reach terminal velocity after falling about 30 m.) m/s