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Water flows through a horizontal tube of variable cross section as shown in the figure. The area of cross section at A and B are 4 mm^{2} and 2 mm^{2} respectively. If 1 cc of water enters per second through A , find (a) the speed of water at A (b) the speed of water at B and (c) the pressure difference P_{A} - P_{B}

Suppose the tube in the previous problem is kept vertical with A upward but the other conditions remain the same. The separation between the cross sections at A and B is 15/16 cm. Find (a) the speed of water at A (b) the speed of water at B (c) the pressure difference P_{A } - P_{B. }. Take g = 10 m s^{-2}

Suppose the tube in the previous problem is kept vertical with B upward . Water enters through B at the rate of 1 cm^{3} s^{-1} . Find (a) the speed of water at A (b) the speed of water at B (c) the pressure difference P_{A - }P_{B.} Note that the speed decreases as the water falls down

Water flows through a horizontal tube of variable cross section as shown in the figure. The area of cross section at A and B are 4 mm^{2} and 2 mm^{2} respectively. If 1 cc of water enters per second through A , find (a) the speed of water at A (b) the speed of water at B and (c) the pressure difference P_{A} - P_{B}

Suppose the tube in the previous problem is kept vertical with A upward but the other conditions remain the same. The separation between the cross sections at A and B is 15/16 cm. Find (a) the speed of water at A (b) the speed of water at B (c) the pressure difference P_{A } - P_{B. }. Take g = 10 m s^{-2}

Suppose the tube in the previous problem is kept vertical with B upward . Water enters through B at the rate of 1 cm^{3} s^{-1} . Find (a) the speed of water at A (b) the speed of water at B (c) the pressure difference P_{A - }P_{B.} Note that the speed decreases as the water falls down

### Asked by Paresh | 2nd Jan, 2016, 08:51: PM

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If the tube is kept vertical with B at the top, then the speed of water entering the tube will be 0.5 m/s and the speed of water at A will be 0.25 m/s.
The pressure difference between the ends remains zero.

### Answered by Yashvanti Jain | 5th Jan, 2016, 11:59: AM

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