Question

The height of the mercury column in a barometer is 756 mm Hg on
a cloudy day.Calculate the atmospheric pressure at that time in pascal.
( Density of mercury p= 13 600 kg/m^3, gravitational acceleration, g = 9.81m/s²)​

Answer 1

Answer:

    p = 1.0076 10⁵ Pa

Explanation:

Atmospheric pressure is given by the relation

         P = rho g h

In this case they indicate that the height of the column of mercury is h = 756 mm Hg

let's reduce the height to the SI system

          h = 756 mm (1m / 1000 mm)

          h = 0.756 m

let's calculate

        P = 13600 9.8 0.756

        p = 1.0076 10⁵ Pa