🔍 Key Concepts

• difference between an unexpected constant list and a gradually changing list • how liquids behave when moved, consumed, or added on a floating unit • the effect of free surface and permanent off-center weight on stability

💭 Think About

• Ask yourself: which option would more likely cause the unit to change heel over time rather than sit at a steady, unchanging angle? • Which situation would create a steady, permanent offset in weight that stays in one place, instead of moving or growing/shrinking? • Think about which cause is likely to be noticed and controlled quickly as part of normal operations versus something that might silently remain.

✅ Before You Answer

• Identify which choices involve normal, monitored operations (like routine transfers/consumption) versus an error or abnormal condition that could leave a fixed off-center load. • Consider whether each option produces a temporary, progressive list or a sudden list that stays constant if nothing else changes. • For each choice, picture where the weight goes: does it stay off to one side permanently, or does it keep changing location/amount over time?