Which outcome characterized cast iron cannons exposed to prolonged firing during 18th-century naval battles?

💡 Explanation

During prolonged firing, rapid heating and cooling cycles induce thermal fatigue in the breech due to constrained expansion, resulting in crack propagation. Therefore breech cracking results, rather than bore expansion, muzzle drooping, or trunnion failure, which require different stress concentrations or temperatures.

• Which consequence results from excessive soil salinity in Aztec chinampa agricultural systems relying on maize cultivation?
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