Question

Convert 1 mm of Hg into pascal. Take density of Hg = 13.6 x 10³ kg m^-3 and g = 9.8 m s^-2 .

Answer 1

Density of Hg = `13.6 xx 10^3` kgm^-3

Acceleration due to gravity , g = 9.8 ms^-2

Height of mercury column = 1mm = 0.001 m

∴ Pressure , P = hρg

or , P = `(0.001)(13.6 × 10^3)(9.8)` pascal

or , P = 133.28 Pa