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- 
- A submarine moves through water at 30 f 
-      t/s.At a point A on the submarine  
-      5 ft above the nose,the velocity o 
-      f the submarine relative to the wa 
-      ter is 50 ft/s.Determine the dynam 
-      ic-pressure difference between thi 
-      s point and the nose,and determine 
-       the difference in total pressure  
-      between the two points.            
- 
- If the submarine is sationary and the w 
-      ater is movinf past it,The velocit 
-      y at the nose is zero and the velo 
-      city at A is 50ft/s.By selecting t 
-      he dynamic pressure at infinity as 
-       zero                              
- 
- Hence dynamic pressure difference betwe 
-      en point A and nose is=            
- 
-  - 2418.75  
- 
- lb/ft^2   
- 
- Hence total pressure difference between 
-       point A and nose is=              
- 
-  - 2730.0334  
- 
- lb/ft^2