978113395063 Do your data indicate that Archimedes\' principle is valid? State c

Question

978113395063 Do your data indicate that Archimedes' principle is valid? State clearly the evidence for your answer. An object with a specific gravity of 0.900 is placed in a liquid with a specific gravity of 0.900. Describe if the object will sink, float, or behave in some other way. An object with a specific gravity of 0.850 is placed in water. What fraction of the object is below the surface of the water? Consider a swimmer who swims first in a freshwater lake and then swims in the ocean. Is the buoyant force on her the same in both cases? If the buoyant force is different for the two cases, state which one is greater and why.

Explanation / Answer

1. Data missing.

2. It will sink completely as specific gravity is same.

3. Specifc gravity of water = 1

Fraction of object immerser = 0.85/1 *100 = 85%

4. No the buoyant force is not same in both the cases as their densities are different.

byoyancy = weight of the fluid displaced

Ocean water's density is more than that of fresh water, so a lesser amount of sea water provides the required buoyancy to enable the swimmer float, and less ocean water needs to be displaced. This makes the job of swimmer easier.
Hence buoyant force is greater in fresh water.

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