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. Let us consider a spherical rain drop, with diameter 4
mm, falling from 5.00 km until reaching the ground. a)
Using that the air density is approximately 1.2 kg/m3
and the water density is 1.00 \times 103 kg/m3 what is
work done by the air resistance? b) What is the total
energy lost by the rain drop during its fall?

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