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

Question

For a submarine, identify when it will have thegreatest buoyant force acting on it. Assume thatneither the volume of the submarine nor the density of the waterchange. Choose all that apply.

1 When it is empty and fully submerged ata depth of 17 m.
When it is full of cargo and fullysubmerged at a depth of 17 m.
When it is empty and floating on thesurface.
When it is full of cargo, fullysubmerged, and resting on the bottom at a depth of 34 m.
When it is full of cargo and floating onthe surface.
When it is in dry dock and no part of itis submerged in water.
When it is empty, fully submerged, andresting on the bottom at a depth of 34m.
1 When it is empty and fully submerged ata depth of 17 m.
When it is full of cargo and fullysubmerged at a depth of 17 m.
When it is empty and floating on thesurface.
When it is full of cargo, fullysubmerged, and resting on the bottom at a depth of 34 m.
When it is full of cargo and floating onthe surface.
When it is in dry dock and no part of itis submerged in water.
When it is empty, fully submerged, andresting on the bottom at a depth of 34m.
1 When it is empty and fully submerged ata depth of 17 m.
When it is full of cargo and fullysubmerged at a depth of 17 m.
When it is empty and floating on thesurface.
When it is full of cargo, fullysubmerged, and resting on the bottom at a depth of 34 m.
When it is full of cargo and floating onthe surface.
When it is in dry dock and no part of itis submerged in water.
When it is empty, fully submerged, andresting on the bottom at a depth of 34m.
1

Explanation / Answer

Buoyancy (also known as the buoyant force) is the force exertedon an object that is wholly or partly immersed in a fluid. Buoyancy is caused by differences in pressure acting onopposite sides of an object immersed in a static fluid. Pressure variations in a fluid are typically caused by gravity(sinceP = P0 + gh). hence the option D whichis When it is full of cargo, fully submerged, and resting on thebottom at a depth of 34 m is correct.

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