Concepts Of Physics MCQ Edition [Volume 1]PhysicsFluid Mechanics

Suppose water is used to construct a barometer. What will be the height of the water column at standard atmospheric pressure ( 76 cm of mercury)?

Options

A1033.6 cm
B1360 cm
C5.59 cm
D10.336 cm

Correct answer

A. 1033.6 cm

Step-by-step solution

At standard atmospheric pressure, the pressure exerted by the mercury column is equal to the pressure exerted by the water column. _ Hg g h_ Hg = _ w g h_ w Given h_ Hg = 76 cm , _ Hg = 13.6 g/cm ³ , and _ w = 1 g/cm ³ . Substituting the values: 13.6 g 76 = 1 g h_ w h_ w = 13.6 76 h_ w = 1033.6 cm

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