Question

Where does liquid exert pressure?

Answer 1

Fluids are made of a large number of very small particles, much too
small to see. These particles are in constant, rapid motion. They bump
into one another. They bump into the walls of any container that holds
them. They bump into objects in the fluid.
As the particles of a fluid bump into an object in the fluid, they
apply forces to the object. The forces, acting over the object’s surface,
exert pressure on the object. When the pressure in a fluid increases, the
particles bump together more frequently. This increases the pressure
on objects in the fluid.
The pressure a fluid exerts on an object in the fluid is applied in
all directions. That is because the particles that make up the fluid can
move in any direction. These particles exert forces as they bump into
objects in the fluid.