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Question

The relative densities of four liquids P, Q, R and S are 1.26, 1.0, 0.84 and 13.6 respectively. An object is floated in all these liquids, one by one. In which liquid the object will float with its maximum volume submerged under the liquid ? 
(a) P 
(b) Q 
(c) R 
(d) S


Solution

Relative density is the ratio of density relative to water. Buoyant force is directly proportional to the density of the liquid. So, If the relative density is higher, it will generate more buoyant force for the same volume of liquid and vice-versa.

Hence, the object will float with its maximum volume submerged in the liquid R as it has the lowest relative density. So, it will require more volume of the object submerged to produce the buoyant force to make the object float.


Physics
Science for Ninth Class - Part I - Physics
Standard IX

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