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State whether the following is true or false.
About a million cloud droplets are needed to make one average raindrop.

  • A.False
  • B.True only at large scales
  • C.False only at small scales
  • D.True

Answer: D

The cube law on a hundredfold increase in diameter gives exactly this figure. It conveys why the collection process must be efficient and why the initial collectors matter so much. A million merger events cannot occur one at a time by chance.

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