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Why a fully loaded on sea is to be partl...

Why a fully loaded on sea is to be partly unloaded fro safety before entering a river of fresh water ?

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Sea water, which is salty, has more density tan the fresh water of the river. Therefore, a boat sinks more in river than it does in a sea.
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Knowledge Check

  • When a loaded boat enters into sea fromo a river, it rises because:

    A
    there is more water in swa than in river
    B
    sea water is denser than river
    C
    there is difference of temperature between the sea water and the river water
    D
    sea is deeper than river water.

  • When a boat in a river enters the sea water, then it

    A
    sinks a little
    B
    rises a little
    C
    remains same
    D
    will drown

  • When an Amoeba is taken from river to sea water, than

    A
    contractile vacuole disappears
    B
    feeding stops
    C
    it divides immediately
    D
    undergoes encystment
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