Q:
      
      
         
            
When a steel ball is placed on the surface of mercury, it does not sink because
         
       
      
      
      
          
      
      
          Answer & Explanation
         Answer: D) the density of mercury  is greater than that of steel         
         
Explanation: A solid sinks in a liquid if its density is greater than that of the liquid. if less, it floats
       
      
      
      
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