Q:
      
      
         
            
The pressure of a fluid varies with depth h as P = PQ+pgh, where p is the fluid density. This expression is associated with
         
       
      
      
      
          
      
      
          Answer & Explanation
         Answer: A) Pascal’s law         
         
Explanation: Pascal's law is a principle in fluid mechanics that states that a pressure change occurring anywhere in a confined incompressible fluid is transmitted throughout the fluid such that the same change occurs everywhere.
This principle is stated mathematically as: P= P + rgh
 
       
      
      
      
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