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Two oblique shocks of opposite family meeting in a supersonic stream produce

  • A.Complete cancellation of both shocks
  • B.Two transmitted shocks and a slip line between them
  • C.A single normal shock
  • D.An expansion fan

Answer: B

Each shock passes through the other and continues, refracted in direction, and because the two streams either side have passed through different shock sequences they emerge with different entropies and velocities. They share a pressure and a direction but not a speed, so a slip line separates them.

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