Discussion
A stream at \( M_1 = 2 \) and \( 50 \) kPa passes through a normal shock. The downstream static pressure is
Answer: A
The pressure ratio at Mach 2 is 4.5, so \( 50 \times 4.5 = 225 \) kPa. This abrupt jump across a vanishingly thin front is what makes shock waves so destructive structurally and what a supersonic intake must manage rather than simply endure.
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