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Discussion

Consider the following statements about turbulence and collection.
1. Inertial differences give droplets relative velocities.
2. Local clustering raises the rate of encounters.
3. Turbulence has no established role in warm rain formation.

  • A.All of them
  • B.1 and 2 only
  • C.3 only
  • D.1 only

Answer: B

The first two are correct and are the accepted mechanisms. The third is contradicted by both laboratory work and simulation, though quantifying the effect in real clouds remains difficult. Direct measurement at the relevant scales is not yet routine.

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