Which situation most directly causes liquid surge in a partially filled water tank?

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Multiple Choice

Which situation most directly causes liquid surge in a partially filled water tank?

Explanation:
Liquid surge comes from inertia: when the vehicle’s motion changes quickly, the liquid resists that change and sloshes. In a partially filled tank there’s air above the liquid, so the surface can move more freely and generate noticeable surge forces against the tank walls. The fastest, largest changes in velocity happen during abrupt stops and rapid turning, so they cause the most direct and pronounced surge. Steady driving, being parked, or only gentle acceleration involve much slower changes in velocity and produce little sloshing by comparison.

Liquid surge comes from inertia: when the vehicle’s motion changes quickly, the liquid resists that change and sloshes. In a partially filled tank there’s air above the liquid, so the surface can move more freely and generate noticeable surge forces against the tank walls. The fastest, largest changes in velocity happen during abrupt stops and rapid turning, so they cause the most direct and pronounced surge. Steady driving, being parked, or only gentle acceleration involve much slower changes in velocity and produce little sloshing by comparison.

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