At what speed will the velocity head of a stream of water be equal to 20 cm of mercury . Taking `(g=10ms^(-2))`.

Explanation

To find the speed at which the velocity head of a stream of water is equal to 20 cm of mercury, we can use the formula for velocity head, which is given by:

\[ \text{Velocity Head} = \frac{V^2}{2g} \]

Where:
- \( V \) is the velocity of the fluid (in m/s),
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