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← HistoryWhich consequence arises when the black powder in an early Chinese fire arrow undergoes rapid oxidation?
A)Propellant nozzle erosion increases rapidly
B)Projectile kinetic energy increases greatly✓
C)Combustion enthalpy remains fairly constant
D)Projectile drag coefficient decreases markedly
💡 Explanation
Projectile kinetic energy increases because the rapid oxidation (combustion) of the gunpowder creates hot expanding gases, which accelerate the arrow; this is due to the principle of internal ballistics. Therefore, kinetic energy increases rather than drag decreasing, as the arrow design wasn't aerodynamically optimized.
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