Question

How does the pressure at a certain depth in sea water differ from that at the same depth in river water? Explain your answer.ICSE Class 9 Physics Chapter Pressure in Fluids and Atmospheric Pressure

Answer 1

Hello Friend,

As we know that, the pressure at a point inside a liquid is directly proportional to the :-
(i) height of the liquid column above that point
(ii) density of the liquid, and
(iii) the acceleration due to gravity

So, we know that the sea water contains the salts thats why it has more density than the river water. It is given in above lines that the liquid pressure increases with increase in density of the liquid. So, the pressure at a certain depth in sea water differ from that at the same depth in river water.

<Hope it helps>
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Answer 2

As pressure of liquid depends upon density of liquid by the relation P= hρ​g. Since sea water has more density than river water due to salt present in it. Therefore pressure of sea water at a certain depth is higher than the river water at same depth.

Hope it helps :)