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if a plane is flying at a speed so that the apex half-angle of its shock wave is 30 degrees, what is the speed if the speed of sound is 320 m/s?

  • physics -

    sin 30 = 1/M = 1/2

    M = 2 = V/a (the Mach number)

    v = 2 a

    a is the sound speed

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