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Thunder is produced by

  • A.rapid heating and explosive expansion of the channel air
  • B.the collision of two oppositely charged cloud regions
  • C.the vibration of raindrops within the electric field
  • D.the movement of the whole cloud through the air

Answer: A

Channel temperatures reach tens of thousands of degrees in microseconds, driving a shock wave. The shock decays into an acoustic wave within a few metres of the channel. What is heard is the decayed remnant of a shock.

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