physics

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a rain drop falls from rest in an atmosphere saturated with water vapour. As it falls, water vapour condenses on drop at rate of mass µ per second. If initial mass of drop is M0, how much distance the drop falls in time t?

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    Why would adding mass increase the drop speed (ignoring air friction)? Didn't Galileo demonstrate falling objects of different mass fall at the same rate?

    d= 1/2 g t^2, it is mass independent (ignoring air friction).

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