Pressure in fluids and upthrust

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Question 5
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Figure 1 compares an identical fully loaded cargo barge floating in the ocean (saltwater) and in a river (freshwater).

Figure 1: An identical fully loaded cargo barge floating in the ocean (saltwater) with less of its hull submerged, and in a river (freshwater) with more of its hull submerged.

Explain, in terms of upthrust and fluid density, why the barge floats lower in the freshwater river than in the saltwater ocean.

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Pressure in fluids and upthrust Questions

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