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← HistoryWhich outcome occurs when gunpowder, used in early Chinese signaling rockets, exceeds its pressure design limit?
A)Casing failure during combustion✓
B)Increased trajectory aiming deviation
C)Unburnt propellant remains stable
D)Extended visible light duration
💡 Explanation
When gunpowder exceeds its pressure tolerance, stress concentration leads to catastrophic casing failure because the hoop stress overcomes material strength, creating rapid crack propagation rather than controlled thrusting; therefore casing fails, rather than stable remains maintaining flight.
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