When a loaded boat enters into the sea from a river, it rises because:
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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
answer is B.
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Detailed 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.