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Pressure measurement - barometer
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A barometer is constructed using a liquid (density = 760 kg/m$^3$). What would be the height of the liquid column, when a mercury barometer reads 76 cm? (density of mercury = 13600 kg/m$^3$)A 0.76 mB 1.36 mC 13.6 mD 136 mAt the same atmospheric pressure, $\rho_{Hg}gh_{Hg}=\rho_{liq}gh_{liq}\Rightarrow h_{liq}=h_{Hg}\times\dfrac{\rho_{Hg}}{\rho_{liq}}=0.76\times\dfrac{13600}{760}=13.6$ m.