A submarine moves horizontally in sea and has its axis 15 m below the surface of water. A pitot-tube  properly placed just in front of the submarine and along its axis is connected to the two Limbs of a U tube  containing mercury. The difference of mercury level is found to be 170 mm. Find the speed of the  submarine knowing that the sp.gr. of mercury is 13.6 and that of sea water is 1.026 with respect of fresh  water

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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A submarine moves horizontally in sea and has its axis 15 m below the surface of water. A pitot-tube 
properly placed just in front of the submarine and along its axis is connected to the two Limbs of a U tube 
containing mercury. The difference of mercury level is found to be 170 mm. Find the speed of the 
submarine knowing that the sp.gr. of mercury is 13.6 and that of sea water is 1.026 with respect of fresh 
water.

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