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26. Water is flowing through a tube of non-uniform cross-section ratio of the radius at entry and exit end of the pipe is 3 : 2. Then the ratio of velocities at entry and exit of liquid is

(a)   4 : 9                                     (b)  9 : 4

(c)   8 : 27                                  (d)  1 : 1

Answer-a

(12)

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12. An ideal gas is taken through the cycle A→ B → C → A, as shown in the figure. If the net heat supplied to the gas in the cycle is 5 J, the work done by the gas in the process C → A is
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(a)      – 5 J (b)  – 10 J (c)   – 15 J (d)  – 20 J Answer-a (118)

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