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Question

A liquid flows through a horizontal tube. The velocities of the liquid in the two sections, which have areas of cross– section A subscript 1 end subscript and A subscript 2 end subscript , are v subscript 1 end subscript and v subscript 2 end subscript respectively. The difference in the levels of the liquid in the two vertical tubes is h–

  1. The volume of the liquid flowing through the tube in unit time is A subscript 1 end subscript V subscript 1 end subscript    
  2. v subscript 2 end subscript minus v subscript 1 end subscript equals square root of 2 g h end root    
  3. v subscript 2 end subscript superscript 2 end superscript minus v subscript 1 end subscript superscript 2 end superscript equals 2 g h    
  4. The energy per unit mass of the liquid is the same in both sections of the tube    

The correct answer is: The volume of the liquid flowing through the tube in unit time is A subscript 1 end subscript V subscript 1 end subscript

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