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In a cloud where all droplets have exactly the same radius, collection growth would

  • A.proceed faster than in a broad spectrum
  • B.proceed at the same rate as usual
  • C.produce raindrops within seconds
  • D.scarcely occur at all

Answer: D

Identical droplets fall at identical speeds and have almost no relative motion. Only turbulence or some other source of differential motion could initiate collection in such a cloud. Uniform spectra are the least favourable case for rain.

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