Which outcome results from improper control of gunpowder grain size during Chinese rocket manufacture?

💡 Explanation

Inconsistent particle surface area alters the burning rate. Deflagration rate is determined by the reactive surface of the composition; because smaller grains mean faster burning and more thrust spikes, control systems become ineffective, resulting in unpredictable propulsion rather than consistent thrust.

• Which factor most directly increased the killing power of first crossbows using small cast bronze trigger mechanisms during the Warring States period?
• Which effect arose as an unintended consequence when Song dynasty alchemists sought an elixir?
• Which innovation improved navigation using astrolabes due to precise angle calculation?
• Which material's lower availability created a major limit on Roman ballista projectile range versus torsion spring power?
• Which structural vulnerability increases when a Roman arch lacks sufficient abutment mass?
• When a historic wooden ship experiences hogging from wave action, which mechanism increases stress amidships?