8. A manometer connected to a closed tap reads
3.5 × 105 N/m2. When the valve is opened, the reading of manometer falls to 3.0 × 105 N/m2, then velocity of flow of water is
(a) 100 m/s (b) 10 m/s
(c) 1 m/s (d) 10√10 m/s
Answer-b
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a