First slide

Fluid statics

Question

When a loaded boat enters into the sea from a river, it rises because:

Very Easy

A

there is more water in sea than in river
B

sea water is denser than river
C

there is difference of temperature
D

sea is deeper than river

Solution

The sea water is denser than river water. Hence a ship experiences more buoyant force in sea water than in river and hence the volume of ship immersed inside water decreases to balance the weight of the ship. Hence it rises when it passes from river to sea.

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