Discussion
Statement I: An aspirator separates chaff from grain because the two have different densities.
Statement II: Terminal velocity depends on the balance between aerodynamic drag and weight.
In the light of the above statements, choose the correct answer.
Answer: A
The reason is correct but density alone does not settle the matter; it is the combination of mass and projected area, expressed as terminal velocity, that the air stream sorts on. Two particles of equal density but different shape separate readily.
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