At what speed the velocity head of a stream of water be equa... | PHYSICS - SURFACE TENSION | SolveeIt | Solveeit

Today, August 19

Question

At what speed the velocity head of a stream of water be equal to 40 cm of Hg

A

282.8 cm/sec

B

432.6 cm/sec

C

632.6 cm/sec

D

832.6 cm/sec

Answer

282.8 cm/sec

Explanation

Solution

$\frac { v ^ { 2 } } { 2 g } = h$ ⇒ $v = \sqrt { 2 g h }$

$= \sqrt { 2 \times 10 ^ { 3 } \times 40 }$ = $282.8 \mathrm {~cm} / \mathrm { s }$