What is the pressure difference psi if a room temperature ma

What is the pressure difference (psi) if a room temperature manometer reads 80 cm height of alcohol?

Solution

Height of alcohol, h=0.8 m

Density of alcohol,p=790 kg/m^3

acceleration due to gravity, g=9.81 m/s^2

So pressure difference in SI units ,P=pgh=6199.92 Pa

1 pascal = 0.000145037738 psi

HEnce P~0.899 psi