Answer :

Let the specific gravity of the material be “x”.

Therefore, the density of the material is,


Given, radius of the sphere is 5 cm.


Therefore, Volume of the sphere,


The mass of the sphere is thus, .


The total mass of the system is, —————(1)


And mass of the water displaced, —————(2)


From buoyant force, equation (1) and (2) are equal.



Solving for x, we get



The specific gravity of the material is 0.8.


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