At what speed the velocity head of a stream of water be equal to $40 cm $ of $Hg$ ........ $cm/sec$
Medium
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(a)$\frac{{{v^2}}}{{2g}} = h$==> $v = \sqrt {2gh} $
$ = \sqrt {2 \times {{10}^3} \times 40} $=$2\sqrt 2 \times {10^2}$=$282.8\;cm/s$
$ = \sqrt {2 \times {{10}^3} \times 40} $=$2\sqrt 2 \times {10^2}$=$282.8\;cm/s$
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