Question

The normal atmospheric pressure is 76cm of mercury. Calculate the pressure in S.I units. [density of mercury = 13600kg/m3 , g= 10 m/s2 ]​

Answer 1

Height of mercury column = h = 76 cm

h = 0.76 m

Density of mercury =p = 13600 kg/m³

Acceleration due to gravity = g = 10 m/s² Pressure = P = ?

P = hpg

P = 0.76 × 13600 × 10 = 103360 N/m²