For a submarine, identify when it will have the greatest buoyant force acting on

Question

For a submarine, identify when it will have the greatest buoyant force acting on it. Assume that neither the volume of the submarine nor the density of the water change. Choose all that apply.
When it is full of cargo, fully submerged, and resting on the bottom at a depth of 88 m.

When it is empty and floating on the surface.
When it is empty, fully submerged, and resting on the bottom at a depth of 88 m. When it is in dry dock and no part of it is submerged in water.
When it is empty and fully submerged at a depth of 44 m.
When it is full of cargo and fully submerged at a depth of 44 m.
When it is full of cargo and floating on the surface.

Explanation / Answer

All the cases in which the submarine is "fully submerged", the submarine will experience the greatest amount of force no matter how much the cargo is or no matter what depth it is at.

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