28. A liquid flows in a tube from left to right as shown in figure.
A1 and A2 are the cross-sections of the portions of the tube as shown. Then the ratio of speeds v1 / v2 will be
(a) A1 / A2 (b) A2/ A1
(c) √A2 / √A1 (d) √A1 / √A2
Answer-b
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a