*50.  To verify her suspicion that a rock specimen is hollow, a geologist weighs the specimen in air and in water. She finds that the specimen weighs twice as much in air as it does in water. The density of the solid part of the specimen is 5.0 x 103 kg/m3. What fraction of the specimen’s apparent volume is solid?

 

An object weighs less submerged due to the buoyant force acting

 

 

 

Since the weight dry is twice the weight wet.

 

Volume submerged is the total volume of the rock.  But Weight dry depends on Volume of actual rock

So

 

Solve for ration of Volume of Rock to Volume total

 

 

 

 

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This page last updated on January 11, 2020