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A spherical raindrop 3.3 mm in diameter falls through a vertical distance of 4000 m. Take the cross-sectional area of a raindrop ,drag coefficient 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 4000 m in the absence of air drag 280 m/s (b) What would its speed be at the end of 4000 m when there is air drag? 1.091 What is the net force acting on the raindrop in the presence of air drag? What is the acceleration when the raindrop reaches terminal speed? m/s

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