Which consequence resulted from increased frictional losses during initial steamship voyages through narrow river channels?

💡 Explanation

Decreased river channel depth increases hull drag and therefore frictional losses; this decreases overall engine efficiency because more power is used overcoming drag, rather than propulsion; elevated vapor pressure is not relevant here.

• Which effect limited the range of Roman torsion-powered siege engines, like ballistae, when targeting fortified walls?
• Which agricultural innovation mitigated nutrient depletion from continuous maize cultivation in pre-Columbian Mesoamerica?
• Which risk dramatically increases when seasonal temperature variations alter Roman aqueduct mortar?
• Which outcome increased the limitations of pre-modern stone arch bridge spans?
• Which structural vulnerability increased in Roman castra walls when siege engines pounded a single point repeatedly?
• Which outcome increased when the Incan rope bridge's cable tension exceeded material yield strength?