Question

A manometer connected to a closed tap reads $4 \times 10 ^ { 5 }$ pascal. Then the velocity of flow of water is

• A. 7 $m s ^ { - 1 }$
• B. 8 $m s ^ { - 1 }$
• C. 9 $m s ^ { - 1 }$
• D. 10 $m s ^ { - 1 }$

Answer 1

Answer: (D)

10 $m s ^ { - 1 }$

Answer 2

$\frac { 4.5 \times 10 ^ { 5 } - 4 \times 10 ^ { 5 } } { 10 ^ { 3 } \times g } = \frac { v ^ { 2 } } { 2 g }$∴ v=10m/s