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 )

Step-by-step solution

Recall the formula of liquid pressure due to column in terms of density of the liquid, the height of the liquid column, and the acceleration due to gravity, P = h ρ g ⇒ 76   cm × ρ Hg × g = h × ρ L × g ⇒ h = 76   cm × ρ H g ρ L = 76   cm × 13600 760 = 13 . 6   m .