Question

Write a short note on pressure due to a liquid column

Answer 1

Pressure measurement is the analysis of an applied force by a fluid (liquid or gas) on a surface. Pressure is typically measured in units of force per unit of surface area. ... A manometer (not to be confused with nanometer) is a good example, as it uses a column of liquid to both measure and indicate pressure.

Answer 2

Pressure due to a liquid column

Let h be the height of the liquid column in a cylinder of cross sectional area A. If ρ is the density of the liquid, then weight of the liquid column W is given by

W = mass of liquid column � g = Ahρg

By definition, pressure is the force acting per unit area

∴ Pressure = weight of liquid column / area of cross section

= Ah g / A

= hρg