We begin our study of fluids with fluid pressure.
Fluid Pressure

Let's start by defining pressure
Standard units would be Pascal (Pa), pound-force per square inch (psi), atmospheres (atm), or specific manometric units such as (mmHg).
Keen readers will find that this expression is similar to stress because it is the same. We use the term stress for solids and pressure for fluids.
In Fluid Statics, pressure is the unit weight of the fluid
Since unit weight