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CT 1: Ratio and Proportion

2846

10 Questions
16 Marks
30 Mins

\(\begin{array}{l} {\rho _{air}}g \times {h_{air}} = {\rho _\omega } \times g{h_\omega }\\ \therefore {h_{air}} = \frac{{{\rho _\omega } \times {h_\omega }}}{{{\rho _{air}}}} = \frac{{1000 \times 75}}{{1.2}} = 62500\;mm = 62.5\;m\\ \therefore V = \sqrt {2gh} = \sqrt {2 \times 9.81 \times 62.5} = 35\;m/s \end{array}\)

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