The value of pressure represented by 1 mm of Hg is equal to

Concept:

Pressure in a fluid is given by

P = ρgh

where ρ = Density of fluid, h = depth inside the fluid

Calculation:

Given:

 s_mercury = 13.6 ⇒ ρmercury = 13.6 × 1000 = 13600 kg/m3 ,h = 1 mm, P = ?

Now, we know that

\({\bf{P}} = {\bf{\rho gh}} \Rightarrow {\bf{P}} = \bf{13600}\times{{{{\bf{9.81 }}_{\bf{}}}\times{\bf{0.001}}}} = 133.416 \ \mathbf{\frac{N}{m^2}}\)